Consolidated Statement Of Income
| Concept | 2023-09-01 to 2023-11-30 | 2023-09-01 to 2023-11-30 | 2023-09-01 to 2023-11-30 | 2023-09-01 to 2023-11-30 | 2023-09-01 to 2023-11-30 | 2023-09-01 to 2023-11-30 | 2022-09-01 to 2022-11-30 | 2022-09-01 to 2022-11-30 | 2022-09-01 to 2022-11-30 | 2022-09-01 to 2022-11-30 | 2022-09-01 to 2022-11-30 | 2022-09-01 to 2022-11-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of income | ||||||||||||
| Statement of income | ||||||||||||
| Net sales | 
                                                300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,057,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,025,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,057,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                996,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                966,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                996,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | — | — | — | — | 
                                                1,784,503,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                862,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Operating expenses | ||||||||||||
| Other operating expenses | ||||||||||||
| Provision of allowance for doubtful accounts | — | — | — | — | 
                                                360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -1,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Operating expenses | ||||||||||||
| Selling, general and administrative expenses | — | — | — | — | 
                                                138,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                129,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other | — | — | — | — | 
                                                73,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                69,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Operating expenses | ||||||||||||
| Gross profit (loss) | — | — | — | — | 
                                                273,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                134,168,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Operating expenses | ||||||||||||
| Operating profit (loss) | 
                                                133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -83,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                217,979,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                215,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                134,806,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,914,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,427,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,362,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,603,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -78,824,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| General and administrative expenses | ||||||||||||
| Ordinary profit (loss) | — | — | — | — | 
                                                139,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                12,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net sales | ||||||||||||
| Net sales of completed construction contracts | — | — | — | — | 
                                                2,025,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                966,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Non-operating income | — | — | — | — | 
                                                7,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                9,744,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividend income | — | — | — | — | 
                                                35,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                25,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest income | — | — | — | — | 
                                                1,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Non-operating income | ||||||||||||
| Other | — | — | — | — | 
                                                4,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                7,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cost of sales | ||||||||||||
| Cost of sales of completed construction contracts | — | — | — | — | 
                                                1,754,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                845,853,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Selling, general and administrative expenses | ||||||||||||
| Non-operating expenses | ||||||||||||
| Interest expenses | — | — | — | — | 
                                                1,629,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other | — | — | — | — | 
                                                801,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Non-operating expenses | — | — | — | — | 
                                                2,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,766,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Gross profit | ||||||||||||
| Profit (loss) before income taxes | — | — | — | — | 
                                                139,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                12,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes - current | — | — | — | — | 
                                                25,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes - deferred | — | — | — | — | 
                                                20,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                7,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes | — | — | — | — | 
                                                46,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                8,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Profit (loss) | — | — | — | — | 
                                                93,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                4,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — |