Statement Of Changes In Equity
| 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 | 2022-04-01 to 2022-12-31 | 2022-10-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|
| Statement of changes in equity | ||||||
| Statement of changes in equity | ||||||
| Net assets | — | 
                                                72,383,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                69,014,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Changes during period | ||||||
| Profit (loss) | 
                                                2,479,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,468,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                250,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                818,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |