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 | 
                                                57,859,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                67,493,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                51,635,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                6,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                598,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,113,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                197,592,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                194,814,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                196,701,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Total assets | — | 
                                                228,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                221,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                230,398,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Basic earnings (loss) per share | 
                                                182.87
                                                
                                             | — | 
                                                59.17
                                                
                                             | — | 
                                                228.31
                                                
                                             | — | 
                                                144.58
                                                
                                             | 
                                                72.44
                                                
                                             | 
| Diluted earnings per share |  | — | — | — |  | — |  | — | 
| Equity-to-asset ratio | — | 
                                                0.860
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.877
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.850
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — |