Key Financial Data Of Group
| Concept | As at 2024-09-30 | 2024-04-01 to 2024-09-30 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 
|---|---|---|---|---|
| Key financial data of group | ||||
| Business results of group | ||||
| Net sales | — | 
                                                7,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | 
                                                -464,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -627,930,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | — | 
                                                -466,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -632,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income | — | 
                                                -465,523,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -632,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | 
                                                5,584,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,983,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | 
                                                5,760,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,184,738,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | — | 
                                                -58.43
                                                
                                             | 
                                                -85.86
                                                
                                             | — | 
| Diluted earnings per share | — |  |  | — | 
| Equity-to-asset ratio | 
                                                0.967
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.966
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Net cash provided by (used in) operating activities | — | 
                                                -714,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -451,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -89,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -34,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                65,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,125,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                4,789,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,582,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |