Key Financial Data Of Reporting Company
| Concept | 2023-04-01 to 2023-12-31 | As at 2023-12-31 | 2023-10-01 to 2023-12-31 | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | As at 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-10-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||||
| Business results of reporting company | ||||||||
| Net sales | 
                                                27,954,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                42,240,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                32,270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                3,871,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                8,785,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,950,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                50,202,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                47,307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                45,998,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Total assets | — | 
                                                56,864,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                54,599,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                52,510,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Basic earnings (loss) per share | 
                                                258.78
                                                
                                             | — | 
                                                54.98
                                                
                                             | — | 
                                                523.94
                                                
                                             | — | 
                                                412.20
                                                
                                             | 
                                                212.33
                                                
                                             | 
| Diluted earnings per share | 
                                                254.25
                                                
                                             | — | — | — | 
                                                523.49
                                                
                                             | — | 
                                                412.02
                                                
                                             | — | 
| Equity-to-asset ratio | — | 
                                                0.869
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.853
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.863
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — |