Semi-Annual Statement Of Changes In Equity
| Concept | 
                                    
                                        As at 2024-02-29  | 
                            
                                
                                    
                                        2023-06-01 to 2024-02-29  | 
                            
                                
                                    
                                        As at 2023-05-31  | 
                            
                                
                                    
                                        2022-06-01 to 2023-02-28  | 
                            
                        
|---|---|---|---|---|
| Semi-annual statement of changes in equity | ||||
| Statement of changes in equity | ||||
| Net assets | 
                                        
                                             
                                                94,599,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                92,667,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Changes during period | ||||
| Profit (loss) | — | 
                                        
                                             
                                                -561,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                620,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     |