Shareholdings
| Concept | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2024-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | As at 2023-01-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Shareholdings | ||||||||||||||||||||||||||
| Reporting company | ||||||||||||||||||||||||||
| Details of specified investment shares held for purposes other than pure investment | ||||||||||||||||||||||||||
| Issue | 
                                                テクノプロ・ホールディングス㈱
                                                
                                             | 
                                                ㈱エスユーエス
                                                
                                             | 
                                                ソーバル㈱
                                                
                                             | 
                                                ㈱フォーラムエンジニアリング
                                                
                                             | 
                                                ㈱オープンアップグループ
                                                
                                             | 
                                                ヒューマンホールディングス㈱
                                                
                                             | 
                                                パーソルホールディングス㈱
                                                
                                             | 
                                                ㈱ジェイテック
                                                
                                             | 
                                                ㈱ヒップ
                                                
                                             | 
                                                ㈱アビスト
                                                
                                             | 
                                                ㈱メイテックグループホールディングス
                                                
                                             | 
                                                ㈱コプロ・ホールディングス
                                                
                                             | 
                                                ㈱アルプス技研
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Number of shares | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                400
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                220
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                2,378
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                438
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                400
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                343,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                293,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                330,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                490,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                221,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Whether issuer of aforementioned shares holds reporting company's shares | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                有
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — |