Key Financial Data Of Group
| Concept | As at 2024-06-20 | 2024-03-21 to 2024-06-20 | 2023-03-21 to 2024-03-20 | As at 2024-03-20 | As at 2023-06-20 | 2023-03-21 to 2023-06-20 | 
|---|---|---|---|---|---|---|
| Key financial data of group | ||||||
| Business results of group | ||||||
| Net sales | — | 
                                                1,864,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,841,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,704,842,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | 
                                                221,763,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                365,669,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                193,983,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | — | 
                                                148,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                160,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                169,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income | — | 
                                                159,812,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                222,877,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                190,412,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,514,879,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,384,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,382,918,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | 
                                                5,848,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,760,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,919,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | — | 
                                                50.89
                                                
                                             | 
                                                54.85
                                                
                                             | — | — | 
                                                58.05
                                                
                                             | 
| Diluted earnings per share | — |  |  | — | — |  | 
| Equity-to-asset ratio | 
                                                0.6009
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.5876
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.6876
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |