Key Financial Data Of Group
| Concept | As at 2024-08-31 | 2024-03-01 to 2024-08-31 | 2023-03-01 to 2024-02-29 | As at 2024-02-29 | 2023-03-01 to 2023-08-31 | As at 2023-08-31 | 
|---|---|---|---|---|---|---|
| Key financial data of group | ||||||
| Business results of group | ||||||
| Net sales | — | 
                                                2,656,889,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,938,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,846,530,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | 
                                                -38,889,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                117,325,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                71,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | — | 
                                                -45,178,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,788,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                40,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income | — | 
                                                -45,178,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,788,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                40,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | 
                                                1,012,695,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,102,814,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,052,309,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | 
                                                2,590,162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,377,695,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,965,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | — | 
                                                -6.17
                                                
                                             | 
                                                12.16
                                                
                                             | — | 
                                                5.59
                                                
                                             | — | 
| Diluted earnings per share | — |  | 
                                                12.00
                                                
                                             | — | 
                                                5.51
                                                
                                             | — | 
| Equity-to-asset ratio | 
                                                0.388
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.462
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.534
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Net cash provided by (used in) operating activities | — | 
                                                47,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                173,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -118,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -33,649,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                47,091,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -105,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                323,952,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                100,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                1,236,981,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,413,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,269,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |