Key Financial Data Of Group
| Concept | 2024-02-01 to 2024-04-30 | As at 2024-04-30 | As at 2024-01-31 | 2023-02-01 to 2024-01-31 | 2023-02-01 to 2023-04-30 | As at 2023-04-30 | 
|---|---|---|---|---|---|---|
| Key financial data of group | ||||||
| Business results of group | ||||||
| Net sales | 
                                                833,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,087,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,004,406,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                61,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                282,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                193,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | 
                                                40,987,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,349,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,034,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income | 
                                                44,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,336,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                143,675,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                2,408,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,434,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,826,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | 
                                                3,137,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,253,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,600,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | 
                                                4.88
                                                
                                             | — | — | 
                                                -160.68
                                                
                                             | 
                                                17.01
                                                
                                             | — | 
| Diluted earnings per share | 
                                                4.88
                                                
                                             | — | — |  | 
                                                16.80
                                                
                                             | — | 
| Equity-to-asset ratio | — | 
                                                0.742
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.728
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.824
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |