Statement Of Changes In Equity
| Concept | 
                                    
                                        2023-04-01 to 2023-09-30  | 
                            
                                
                                    
                                        As at 2023-09-30  | 
                            
                        
|---|---|---|
| Statement of changes in equity | ||
| Statement of changes in equity | ||
| Net assets | — | 
                                        
                                             
                                                5,654,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Changes during period | ||
| Profit (loss) | 
                                        
                                             
                                                592,199,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — |