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 | 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 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of income | ||||||||||
| Statement of income | ||||||||||
| Net sales | ||||||||||
| Net sales | 
                                                84,190,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,157,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                73,688,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                68,443,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net sales of completed construction contracts | 
                                                82,829,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                76,692,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                72,521,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                67,206,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net sales in sideline businesses | 
                                                1,361,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,464,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,166,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,237,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating revenue | ||||||||||
| Cost of sales | ||||||||||
| Cost of sales of completed construction contracts | 
                                                65,676,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                60,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                55,728,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cost of sales in sideline businesses | 
                                                1,088,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,171,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                984,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cost of sales | 
                                                66,764,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,884,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                61,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                56,712,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating expenses | ||||||||||
| Research and development expenses | 
                                                433,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                344,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Depreciation | 
                                                282,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                273,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                247,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                239,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Provision of allowance for doubtful accounts | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other | 
                                                2,078,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,906,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                168,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating expenses | ||||||||||
| Other operating expenses | ||||||||||
| Operating expenses | ||||||||||
| Selling, general and administrative expenses | 
                                                7,795,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,081,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                6,895,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,233,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Taxes and dues | — | 
                                                294,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                233,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating expenses | ||||||||||
| Operating expenses - general | ||||||||||
| Remuneration for directors (and other officers) | 
                                                260,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                223,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                133,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Welfare expenses | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                177,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                198,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                176,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Rent expenses on land and buildings | — | 
                                                203,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                215,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating profit (loss) | 
                                                9,629,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,191,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                5,792,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,497,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Gross profit (loss) | 
                                                17,425,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,272,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                12,687,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,730,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Gross profit | ||||||||||
| Gross profit (loss) on completed construction contracts | 
                                                17,152,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,979,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                12,421,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,477,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Gross profit (loss) on sideline businesses | 
                                                273,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                293,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                266,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| General and administrative expenses | ||||||||||
| Salaries | — | — | — | — | — | — | — | — | — | — | 
| Donations | — | 
                                                14,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                9,935,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,539,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                6,374,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,146,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating income | ||||||||||
| Interest income | 
                                                15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating income | ||||||||||
| Non-operating income | 
                                                389,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                440,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                602,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                674,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Financial revenue | — | — | — | — | — | — | — | — | — | — | 
| Dividend income | 
                                                269,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                236,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                278,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Miscellaneous income | 
                                                27,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                24,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                38,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary income | 
                                                199,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                199,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Selling, general and administrative expenses | ||||||||||
| Employees' salaries and allowances | 
                                                3,424,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,954,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,691,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Advertising expenses | — | 
                                                93,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                89,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Legal welfare expenses | 
                                                617,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                548,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                550,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                488,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repair and maintenance expenses | — | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Stationery expenses | — | 
                                                39,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                37,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Communication and transportation expenses | 
                                                286,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                251,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                275,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                240,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Power utilities expenses | — | 
                                                35,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                33,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Research study expenses | — | 
                                                77,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                53,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Entertainment expenses | 
                                                112,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                130,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                111,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Insurance expenses | — | 
                                                48,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                65,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating expenses | ||||||||||
| Interest expenses | 
                                                17,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                12,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating expenses | ||||||||||
| Extraordinary losses | 
                                                15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Loss on disposal of non-current assets | 
                                                15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating expenses | ||||||||||
| Non-operating expenses | 
                                                84,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                25,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Financial expenses | — | — | — | — | — | — | — | — | — | — | 
| Extraordinary income | ||||||||||
| Gain on sale of non-current assets | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Gain on sale of investment securities | 
                                                182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) before income taxes | 
                                                10,119,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,724,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                6,490,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,262,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary losses | ||||||||||
| Income taxes - current | 
                                                2,929,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,735,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,002,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes - deferred | 
                                                -66,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -44,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -17,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| General and administrative expenses | ||||||||||
| Income taxes | 
                                                2,862,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,691,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,982,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,873,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) | 
                                                7,257,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,032,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,032,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,032,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,032,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,389,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,508,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,389,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,389,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,389,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |