Consolidated Statement Of Income
| Concept | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of income | ||||||||||||||
| Statement of income | ||||||||||||||
| Net sales | 
                                                478,383,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,805,162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,933,811,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,131,377,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                847,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,933,811,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                802,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,034,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,034,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,172,170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                862,367,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                335,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,039,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                797,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | — | — | 
                                                3,933,026,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                4,179,412,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Operating expenses | ||||||||||||||
| Selling, general and administrative expenses | — | — | 
                                                1,072,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,069,877,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Operating expenses | ||||||||||||||
| Other operating expenses | ||||||||||||||
| Provision for retirement benefits for directors (and other officers) | — | — | 
                                                6,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                8,682,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Operating expenses | ||||||||||||||
| Operating profit (loss) | 
                                                226,385,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                559,976,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -71,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                948,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                161,730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,784,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -214,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                855,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                884,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -28,930,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                144,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                596,255,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Gross profit (loss) | — | — | 
                                                1,000,784,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                855,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Ordinary profit (loss) | — | — | 
                                                -55,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -198,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Net sales | ||||||||||||||
| Net sales of completed construction contracts | — | — | 
                                                3,738,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                3,570,091,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Non-operating income | ||||||||||||||
| Interest income | — | — | 
                                                3,695,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Dividend income | — | — | 
                                                6,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                7,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Other | — | — | 
                                                3,523,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                3,524,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Non-operating income | — | — | 
                                                18,864,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                18,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Selling, general and administrative expenses | ||||||||||||||
| Cost of sales | ||||||||||||||
| Cost of sales of completed construction contracts | — | — | 
                                                3,231,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                3,263,981,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Non-operating expenses | ||||||||||||||
| Other | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                59,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Non-operating expenses | — | — | 
                                                2,317,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Extraordinary losses | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,766,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Profit (loss) before income taxes | — | — | 
                                                -55,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -200,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Gross profit | ||||||||||||||
| Gross profit (loss) on completed construction contracts | — | — | 
                                                507,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                306,110,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Income taxes - current | — | — | 
                                                -7,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -49,561,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Extraordinary losses | ||||||||||||||
| Loss on sale of non-current assets | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Loss on retirement of non-current assets | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                64,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Income taxes | — | — | 
                                                -7,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -49,561,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
| Profit (loss) | — | — | 
                                                -48,212,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -151,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — |