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 | 
                                                54,149,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                70,437,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                52,590,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                1,017,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -1,102,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,345,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                9,502,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,696,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                10,164,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Total assets | — | 
                                                31,789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                28,938,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                31,673,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Basic earnings (loss) per share | 
                                                16.35
                                                
                                             | — | 
                                                3.59
                                                
                                             | — | 
                                                -61.65
                                                
                                             | — | 
                                                -32.46
                                                
                                             | 
                                                -11.96
                                                
                                             | 
| Diluted earnings per share |  | — | — | — |  | — |  | — | 
| Equity-to-asset ratio | — | 
                                                0.297
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.298
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.318
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — |