Shareholdings
| Concept | 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 | 
                                                東京テアトル㈱
                                                
                                             | 
                                                ㈱電通グループ
                                                
                                             | 
| Number of shares | 
                                                50,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,032
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                53,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |