Consolidated Statement Of Income
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of income | ||||||||||||||
| Statement of income | ||||||||||||||
| Ordinary income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other operating income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Share of profit of entities accounted for using equity method | — | 
                                                135,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                146,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Operating expenses | ||||||||||||||
| Operating expenses - general | ||||||||||||||
| Remuneration for directors (and other officers) | — | — | 
                                                485,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                424,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Welfare expenses | — | — | 
                                                504,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Rent expenses on land and buildings | — | — | 
                                                1,307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                1,196,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Taxes and dues | — | — | 
                                                706,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                538,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | 
                                                1,024,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                905,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                742,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                735,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating expenses | ||||||||||||||
| Selling, general and administrative expenses | — | 
                                                18,312,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,379,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                15,340,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                14,780,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Provision of allowance for doubtful accounts | — | 
                                                35,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -36,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -35,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating expenses | ||||||||||||||
| Other operating expenses | ||||||||||||||
| Operating expenses | ||||||||||||||
| Operating profit (loss) | — | 
                                                23,037,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,998,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                10,877,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                10,574,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| General and administrative expenses | ||||||||||||||
| Salaries | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Donations | — | — | 
                                                55,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                49,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating expenses | ||||||||||||||
| Research and development expenses | — | 
                                                1,467,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                1,286,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Net sales | ||||||||||||||
| Net sales of completed construction contracts | — | 
                                                262,732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                248,681,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                197,431,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                186,930,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | 
                                                23,479,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,272,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                11,918,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                11,515,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Selling, general and administrative expenses | ||||||||||||||
| Employees' salaries and allowances | — | — | 
                                                7,258,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                6,057,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Legal welfare expenses | — | — | 
                                                915,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                802,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Advertising expenses | — | — | 
                                                698,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                261,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repair and maintenance expenses | — | — | 
                                                68,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                68,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Stationery expenses | — | — | 
                                                171,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                176,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Communication and transportation expenses | — | 
                                                1,284,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,240,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                1,137,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,098,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Power utilities expenses | — | — | 
                                                143,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                149,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Research study expenses | — | — | 
                                                1,122,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                964,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Entertainment expenses | — | — | 
                                                596,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                638,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Insurance expenses | — | — | 
                                                28,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                26,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Miscellaneous expenses | — | — | 
                                                772,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                576,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating income | ||||||||||||||
| Interest income | — | 
                                                18,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                44,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividend income | — | 
                                                391,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                391,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                405,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                405,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other | — | 
                                                59,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                89,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                85,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating income | — | 
                                                789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                628,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                1,180,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,060,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary income | — | 
                                                1,214,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,214,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                1,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cost of sales | ||||||||||||||
| Cost of sales of completed construction contracts | — | 
                                                221,382,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                208,302,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                171,213,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                161,574,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating expenses | ||||||||||||||
| Interest expenses | — | 
                                                240,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                241,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                80,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                67,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other | — | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                14,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating expenses | — | 
                                                347,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                354,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                139,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary losses | — | 
                                                731,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                489,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                227,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                227,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Impairment losses | — | 
                                                336,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                336,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                102,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                102,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) before income taxes | — | 
                                                23,963,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,997,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                13,268,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                12,865,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Gross profit | ||||||||||||||
| Gross profit (loss) on completed construction contracts | — | 
                                                41,349,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                26,217,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                25,355,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary income | ||||||||||||||
| Gain on sale of non-current assets | — | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Gain on sale of investment securities | — | 
                                                1,140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                1,574,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,574,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes - current | — | 
                                                7,372,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,299,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                4,668,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,580,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary losses | ||||||||||||||
| Loss on retirement of non-current assets | — | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                24,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                24,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes - deferred | — | 
                                                -917,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -810,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -520,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -513,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes | — | 
                                                6,454,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,488,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                4,147,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,066,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) | — | 
                                                17,508,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,508,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,508,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,508,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,508,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,799,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,799,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,799,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,799,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to non-controlling interests | — | 
                                                64,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                33,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Profit (loss) attributable to owners of parent | 
                                                17,443,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,443,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                17,443,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,087,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,087,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,087,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other comprehensive income | ||||||||||||||
| Valuation difference on available-for-sale securities | — | 
                                                -310,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                1,638,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Foreign currency translation adjustment | — | 
                                                479,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                28,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Remeasurements of defined benefit plans, net of tax | — | 
                                                195,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                2,923,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Share of other comprehensive income of entities accounted for using equity method | — | 
                                                -183,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                183,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Other comprehensive income | — | 
                                                179,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                4,773,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Profit attributable to | ||||||||||||||
| Comprehensive income | — | 
                                                17,687,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                13,894,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Comprehensive income attributable to | ||||||||||||||
| Comprehensive income attributable to owners of parent | — | 
                                                17,532,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                13,844,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Comprehensive income attributable to non-controlling interests | — | 
                                                155,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — |