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 | 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 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Shareholdings | ||||||||||||||||||||
| Second largest holding company | ||||||||||||||||||||
| Details of specified investment shares held for purposes other than pure investment | ||||||||||||||||||||
| Issue | 
                                                ㈱テレビ東京ホールディングス
                                                
                                             | 
                                                ㈱テレビ朝日ホールディングス
                                                
                                             | 
                                                ユニ・チャーム㈱
                                                
                                             | 
                                                ㈱フジ・メディア・ホールディングス
                                                
                                             | 
                                                ㈱TBSホールディングス
                                                
                                             | 
                                                ㈱イード
                                                
                                             | 
                                                日本テレビホールディングス㈱
                                                
                                             | 
                                                花王㈱
                                                
                                             | 
                                                ㈱NexTone
                                                
                                             | 
                                                松竹㈱
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Number of shares | 
                                                131,300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,135,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                826,146
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,499,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                2,826,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                517,700
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,218,300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                209,400
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                300,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                90,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,499,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                131,300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                300,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                209,400
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                90,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,218,300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                2,826,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                275,382
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                517,700
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,135,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                467,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,877,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                982,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,825,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,053,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                427,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,720,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,355,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                363,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,107,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,974,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                392,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                426,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,180,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                878,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,825,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,322,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,331,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                398,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,435,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Purpose of shareholding, overview of business alliance, quantitative effects of shareholding and reason for increase in number of shares | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1
                                                
                                             | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1
                                                
                                             | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1(株式数が増加した理由)株式分割のため
                                                
                                             | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1
                                                
                                             | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1
                                                
                                             | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1
                                                
                                             | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1
                                                
                                             | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1
                                                
                                             | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1
                                                
                                             | 
                                                (保有目的)取引関係の維持強化のため(定量的な保有効果)※1
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Whether issuer of aforementioned shares holds reporting company's shares | 
                                                有※2
                                                
                                             | 
                                                有
                                                
                                             | 
                                                無
                                                
                                             | 
                                                有
                                                
                                             | 
                                                有※2
                                                
                                             | 
                                                無
                                                
                                             | 
                                                有※2
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | — | — | — | — | — | — | — | — | — | — |