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 | — | — | 
                                                6,381,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,566,699,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,420,894,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | — | 
                                                777,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,202,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                764,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | — | 
                                                7,420,334,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,862,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,541,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | — | 
                                                12,040,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,021,979,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                11,622,440,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | 
                                                69.91
                                                
                                             | — | 
                                                99.42
                                                
                                             | — | 
                                                127.87
                                                
                                             | 
                                                43.05
                                                
                                             | — | 
                                                86.56
                                                
                                             | 
| Diluted earnings per share | — | — |  | — |  | — | — |  | 
| Equity-to-asset ratio | — | 
                                                0.616
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.761
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.563
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |