Shareholdings
| Concept | As at 2025-03-31 | As at 2024-03-31 | 
|---|---|---|
| Shareholdings | ||
| Reporting company | ||
| Details of deemed holdings of shares held for purposes other than pure investment | ||
| Issue | 
                                                ㈱三井住友フィナンシャルグループ
                                                
                                             | — | 
| Number of shares | 
                                                840,300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                280,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                3,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,495,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Purpose of shareholding, overview of business alliance, quantitative effects of shareholding and reason for increase in number of shares | 
                                                退職給付信託の受託者に対し、当社が議決権行使の指図権を有しております。なお、2024年10月1日の株式分割(1:3)により株式数が増加しました。
                                                
                                             | — | 
| Whether issuer of aforementioned shares holds reporting company's shares | 
                                                無
(注)
                                                
                                             | — |