Key Financial Data Of Reporting Company
| Concept | As at 2023-09-30 | 2023-07-01 to 2023-09-30 | 2022-07-01 to 2023-06-30 | As at 2023-06-30 | 
|---|---|---|---|---|
| Key financial data of reporting company | ||||
| Business results of reporting company | ||||
| Net sales | — | 
                                                225,052,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,353,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | 
                                                -114,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) | — | 
                                                -120,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                228,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Equity in earnings (losses) of affiliates if equity method is applied | — | 
                                                737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Share capital | 
                                                1,131,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total number of issued shares | 
                                                4,684,200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | — | 
                                                3,636,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Net assets | 
                                                3,109,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,166,377,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | 
                                                3,486,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,576,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Dividend paid per share | — |  |  | — | 
| Basic earnings (loss) per share | — | 
                                                -26.43
                                                
                                             | 
                                                62.85
                                                
                                             | — | 
| Diluted earnings per share | — |  |  | — | 
| Equity-to-asset ratio | 
                                                0.891
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.739
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |