Key Financial Data Of Reporting Company
| Concept | As at 2024-05-31 | 2024-03-01 to 2024-05-31 | 2023-09-01 to 2024-05-31 | As at 2023-08-31 | 2022-09-01 to 2023-08-31 | 
|---|---|---|---|---|---|
| Key financial data of reporting company | |||||
| Business results of reporting company | |||||
| Ordinary profit (loss) | — | — | 
                                                -1,175,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                225,761,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) | — | — | 
                                                -1,177,479,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                223,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Equity in earnings (losses) of affiliates if equity method is applied | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                90,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                90,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total number of issued shares | 
                                                56,443,800
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | — | 
                                                56,443,800
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | 
| Net assets | 
                                                3,323,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,500,881,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | 
                                                3,462,039,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,909,123,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividend paid per share | — | — |  | — |  | 
| Basic earnings (loss) per share | — | 
                                                -6.64
                                                
                                             | 
                                                -20.86
                                                
                                             | — | 
                                                3.96
                                                
                                             | 
| Diluted earnings per share | — | — |  | — |  | 
| Equity-to-asset ratio | 
                                                0.952
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.912
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |