Consolidated Statement Of Income
| Concept | 2024-01-01 to 2024-06-30 | 2023-01-01 to 2023-06-30 | 
|---|---|---|
| Consolidated statement of income | ||
| Statement of income | ||
| Operating expenses | ||
| Selling, general and administrative expenses | 
                                                1,738,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,941,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision of allowance for doubtful accounts | 
                                                18,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                434,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||
| Other operating expenses | ||
| Operating expenses | ||
| Gross profit (loss) | 
                                                3,912,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,967,630,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||
| Operating profit (loss) | 
                                                2,173,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,025,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | 
                                                2,198,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,045,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| General and administrative expenses | ||
| Net sales | ||
| Net sales of completed construction contracts | 
                                                31,121,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,968,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Selling, general and administrative expenses | ||
| Non-operating income | ||
| Dividend income | 
                                                9,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Interest income | 
                                                6,789,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                9,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating income | 
                                                30,285,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Extraordinary income | 
                                                1,266,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | ||
| Cost of sales of completed construction contracts | 
                                                27,209,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,000,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating expenses | ||
| Interest expenses | 
                                                2,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,503,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating expenses | 
                                                5,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) before income taxes | 
                                                2,199,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,045,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Gross profit | ||
| Extraordinary income | ||
| Gain on sale of investment securities | 
                                                1,266,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes - current | 
                                                687,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                521,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes - deferred | 
                                                41,561,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -16,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes | 
                                                729,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                504,531,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) | 
                                                1,469,969,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                541,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to non-controlling interests | 
                                                8,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | 
                                                1,461,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                526,107,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | ||
| Valuation difference on available-for-sale securities | 
                                                124,121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                42,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans, net of tax | 
                                                -40,796,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                86,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | 
                                                126,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                163,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit attributable to | ||
| Comprehensive income | 
                                                1,596,113,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                704,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income attributable to | ||
| Comprehensive income attributable to owners of parent | 
                                                1,588,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                689,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income attributable to non-controlling interests | 
                                                8,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |