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 | — | — | 
                                                4,654,738,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,072,191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,611,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | — | 
                                                514,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                566,466,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                510,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | — | 
                                                4,408,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,172,762,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,472,068,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | — | 
                                                6,138,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,661,746,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,993,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | 
                                                28.96
                                                
                                             | — | 
                                                59.42
                                                
                                             | — | 
                                                56.31
                                                
                                             | 
                                                25.20
                                                
                                             | — | 
                                                67.30
                                                
                                             | 
| Diluted earnings per share | — | — | 
                                                59.36
                                                
                                             | — | 
                                                56.12
                                                
                                             | — | — | 
                                                67.03
                                                
                                             | 
| Equity-to-asset ratio | — | 
                                                0.698
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.717
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.711
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |