Notes - Segment Information
| Concept | 2024-01-01 to 2024-06-30 | As at 2024-06-30 | 2024-04-01 to 2024-06-30 | As at 2023-12-31 | 2023-01-01 to 2023-06-30 | 2023-04-01 to 2023-06-30 | 
|---|---|---|---|---|---|---|
| Notes - Segment information | ||||||
| Segment information | ||||||
| Other income and expenses, net | 
                                                6,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) before tax | 
                                                -668,935,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -326,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -744,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -300,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | — | 
                                                2,342,804,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,016,840,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — |