Key Financial Data Of Group
| Concept | 2024-03-01 to 2024-05-31 | As at 2024-05-31 | 2023-03-01 to 2024-02-29 | As at 2024-02-29 | As at 2023-05-31 | 2023-03-01 to 2023-05-31 | 
|---|---|---|---|---|---|---|
| Key financial data of group | ||||||
| Business results of group | ||||||
| Net sales | 
                                                2,626,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,730,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,390,899,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | 
                                                285,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                825,866,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                269,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | 
                                                183,517,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                358,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                174,877,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income | 
                                                218,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                456,235,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                189,561,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | — | 
                                                2,847,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,744,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,478,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | — | 
                                                6,048,637,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,419,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,218,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | 
                                                198.80
                                                
                                             | — | 
                                                388.78
                                                
                                             | — | — | 
                                                189.41
                                                
                                             | 
| Diluted earnings per share |  | — |  | — | — |  | 
| Equity-to-asset ratio | — | 
                                                0.439
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.475
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.456
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |