Key Financial Data Of Reporting Company
| Concept | 2023-09-01 to 2024-02-29 | As at 2024-02-29 | 2023-12-01 to 2024-02-29 | 2022-09-01 to 2023-08-31 | As at 2023-08-31 | As at 2023-02-28 | 2022-09-01 to 2023-02-28 | 2022-12-01 to 2023-02-28 | 
|---|---|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||||
| Business results of reporting company | ||||||||
| Net sales | 
                                                1,137,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,428,748,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,233,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                -68,920,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                56,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                68,609,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                2,952,332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,111,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,123,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Total assets | — | 
                                                3,546,260,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,672,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,796,722,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Basic earnings (loss) per share | 
                                                -12.76
                                                
                                             | — | 
                                                -10.74
                                                
                                             | 
                                                -1.88
                                                
                                             | — | — | 
                                                2.22
                                                
                                             | 
                                                0.75
                                                
                                             | 
| Diluted earnings per share |  | — | — |  | — | — | 
                                                2.22
                                                
                                             | — | 
| Equity-to-asset ratio | — | 
                                                0.833
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.847
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.823
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                -33,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                136,382,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                118,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                -29,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -97,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                45,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                -18,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -16,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -7,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                2,463,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,544,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,678,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — |