Statement Of Members' Equity
| Concept | 
                                    
                                        2024-12-21 to 2025-06-20  | 
                            
                                
                                    
                                        As at 2025-06-20  | 
                            
                                
                                    
                                        As at 2024-12-20  | 
                            
                                
                                    
                                        2023-12-21 to 2024-06-20  | 
                            
                        
|---|---|---|---|---|
| Statement of members' equity | ||||
| Statement of members' equity | ||||
| Net assets | — | 
                                        
                                             
                                                5,905,561,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                5,907,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Changes during period | ||||
| Profit (loss) | 
                                        
                                             
                                                117,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | 
                                        
                                             
                                                116,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     |