Shareholdings
| Concept | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 
|---|---|---|
| Shareholdings | ||
| Second largest holding company | ||
| Investment shares held for purposes other than pure investment | ||
| Shares not listed | ||
| Number of issues | — | 
                                                41
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Carrying amount | — | 
                                                9,580,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Number of issues whose number of shares increased | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Total acquisition cost for increased shares | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Reason for increase in number of shares |  | — | 
| Number of issues whose number of shares decreased | 
                                                1
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Total sale amount for decreased shares | 
                                                14,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Shares other than those not listed | ||
| Number of issues | — | 
                                                13
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Carrying amount | — | 
                                                8,533,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Number of issues whose number of shares increased | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Total acquisition cost for increased shares | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Reason for increase in number of shares |  | — | 
| Number of issues whose number of shares decreased | 
                                                5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Total sale amount for decreased shares | 
                                                929,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — |