Key Financial Data Of Group
| 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 | 2022-10-01 to 2023-03-31 | 
|---|---|---|---|---|---|
| Key financial data of group | |||||
| Business results of group | |||||
| Net sales | 
                                                2,528,804,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,906,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | 
                                                -17,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                45,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | 
                                                -19,641,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                43,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income | 
                                                -19,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                43,968,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | — | 
                                                691,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                497,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | — | 
                                                2,511,387,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,209,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | 
                                                -14.97
                                                
                                             | — | 
                                                -21.82
                                                
                                             | — | 
                                                36.13
                                                
                                             | 
| Diluted earnings per share |  | — | — | — |  | 
| Equity-to-asset ratio | — | 
                                                0.275
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.225
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |