Key Financial Data Of Reporting Company
| Concept | 2024-01-01 to 2024-06-30 | As at 2024-06-30 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-06-30 | As at 2023-06-30 | 
|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||
| Business results of reporting company | ||||||
| Net sales | 
                                                231,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                -84,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -930,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -480,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                2,487,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,924,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,680,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | 
                                                2,532,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,052,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,736,748,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | 
                                                -1.51
                                                
                                             | — | 
                                                -26.82
                                                
                                             | — | 
                                                -14.97
                                                
                                             | — | 
| Diluted earnings per share |  | — |  | — |  | — | 
| Equity-to-asset ratio | — | 
                                                0.962
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.906
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.930
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Net cash provided by (used in) operating activities | 
                                                -218,271,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -913,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -615,290,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                -265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                658,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,639,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                950,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                2,166,353,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,720,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,326,217,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |