Key Financial Data Of Reporting Company
| Concept | 2024-01-01 to 2024-03-31 | As at 2024-03-31 | 2023-07-01 to 2024-03-31 | As at 2023-06-30 | 2022-07-01 to 2023-06-30 | 2023-01-01 to 2023-03-31 | As at 2023-03-31 | 2022-07-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||||
| Business results of reporting company | ||||||||
| Net sales | — | — | 
                                                4,209,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,343,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,462,262,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | — | 
                                                353,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                50,864,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                286,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | — | 
                                                2,429,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,234,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,428,497,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | — | 
                                                6,146,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,243,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,459,969,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | 
                                                50.36
                                                
                                             | — | 
                                                44.77
                                                
                                             | — | 
                                                -8.81
                                                
                                             | 
                                                57.11
                                                
                                             | — | 
                                                33.43
                                                
                                             | 
| Diluted earnings per share | — | — | 
                                                44.12
                                                
                                             | — |  | — | — | 
                                                32.94
                                                
                                             | 
| Equity-to-asset ratio | — | 
                                                0.378
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.407
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.361
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |