Shareholdings
| Concept | As at 2024-05-31 | As at 2023-05-31 | 
|---|---|---|
| Shareholdings | ||
| Largest holding company | ||
| Details of specified investment shares held for purposes other than pure investment | ||
| Issue | 
                                                ANAホールディングス(株)
                                                
                                             | — | 
| Number of shares | 
                                                400
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                400
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                1,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Purpose of shareholding, overview of business alliance, quantitative effects of shareholding and reason for increase in number of shares | 
                                                株主優待の利用によるコスト削減目的
                                                
                                             | — | 
| Whether issuer of aforementioned shares holds reporting company's shares | 
                                                無
                                                
                                             | — |