Key Financial Data Of Reporting Company
| Concept | 2023-09-01 to 2023-11-30 | As at 2023-11-30 | 2022-09-01 to 2023-08-31 | As at 2023-08-31 | 2022-09-01 to 2022-11-30 | As at 2022-11-30 | 
|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||
| Business results of reporting company | ||||||
| Net sales | 
                                                584,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,428,748,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                612,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary income | 
                                                -29,023,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                56,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                33,398,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                3,086,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,111,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,107,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | 
                                                3,655,895,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,672,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,652,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | 
                                                -2.02
                                                
                                             | — | 
                                                -1.88
                                                
                                             | — | 
                                                1.48
                                                
                                             | — | 
| Diluted earnings per share |  | — |  | — | 
                                                1.47
                                                
                                             | — | 
| Equity-to-asset ratio | — | 
                                                0.844
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.847
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.851
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |