Shareholdings
| Concept | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 
|---|---|---|---|---|---|
| Shareholdings | |||||
| Reporting company | |||||
| Investment shares reclassified from held for purposes other than pure investment to held for pure investment | |||||
| Issue | 
                                                双日㈱
                                                
                                             | 
                                                大阪瓦斯㈱
                                                
                                             | 
                                                大阪製鐵㈱
                                                
                                             | 
                                                ㈱三菱UFJフィナンシャル・グループ
                                                
                                             | 
                                                ㈱大阪ソーダ
                                                
                                             | 
| Number of shares | 
                                                16,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                227,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                5,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                983,620
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                52,512,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                769,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,978,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,624,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |