Key Financial Data Of Group
| Concept | As at 2024-03-31 | 2024-01-01 to 2024-03-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|
| Key financial data of group | ||||||
| Business results of group | ||||||
| Net sales | — | 
                                                4,980,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,242,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,142,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | 
                                                452,982,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,515,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                498,817,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | — | 
                                                289,686,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                966,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                325,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income | — | 
                                                617,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,300,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                401,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | 
                                                22,562,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                22,440,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                22,388,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | 
                                                32,459,871,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                32,451,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                32,112,604,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | — | 
                                                15.81
                                                
                                             | 
                                                52.76
                                                
                                             | — | 
                                                17.75
                                                
                                             | — | 
| Diluted earnings per share | — | 
                                                15.78
                                                
                                             | 
                                                52.63
                                                
                                             | — | 
                                                17.71
                                                
                                             | — | 
| Equity-to-asset ratio | 
                                                0.695
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.692
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.687
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |