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 | 
|---|---|---|---|---|---|---|---|
| Shareholdings | |||||||
| Largest holding company | |||||||
| Investment shares reclassified from held for purposes other than pure investment to held for pure investment | |||||||
| Issue | 
                                                株式会社ハチバン
                                                
                                             | 
                                                株式会社大和
                                                
                                             | 
                                                株式会社ゴールドウイン
                                                
                                             | 
                                                福島印刷株式会社
                                                
                                             | 
                                                ダイト株式会社
                                                
                                             | 
                                                株式会社CKサンエツ
                                                
                                             | 
                                                タケダ機械株式会社
                                                
                                             | 
| Number of shares | 
                                                19,700
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                165,740
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,225,336
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                89,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                13,480
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                247,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                22,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                66,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                942,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |