Semi-Annual Statement Of Changes In Equity
| Concept | 
                                    
                                        As at 2024-06-30  | 
                            
                                
                                    
                                        2024-01-01 to 2024-06-30  | 
                            
                                
                                    
                                        As at 2023-12-31  | 
                            
                                
                                    
                                        2023-01-01 to 2023-06-30  | 
                            
                        
|---|---|---|---|---|
| Semi-annual statement of changes in equity | ||||
| Statement of changes in equity | ||||
| Net assets | 
                                        
                                             
                                                51,777,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                49,006,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Changes during period | ||||
| Profit (loss) | — | 
                                        
                                             
                                                3,296,325,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                3,204,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     |