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 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 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Shareholdings | ||||||||||||||||||||||||||
| Reporting company | ||||||||||||||||||||||||||
| Details of specified investment shares held for purposes other than pure investment | ||||||||||||||||||||||||||
| Issue | 
                                                名古屋電機工業㈱
                                                
                                             | 
                                                ㈱みずほフィナンシャルグループ
                                                
                                             | 
                                                ㈱FFRIセキュリティ
                                                
                                             | 
                                                ㈱大垣共立銀行
                                                
                                             | 
                                                ㈱藤商事
                                                
                                             | 
                                                ㈱共和電業
                                                
                                             | 
                                                森尾電機㈱
                                                
                                             | 
                                                ㈱ファインデックス
                                                
                                             | 
                                                双葉電子工業㈱
                                                
                                             | 
                                                ㈱セルシス
                                                
                                             | 
                                                ㈱アクセル
                                                
                                             | 
                                                ㈱デジタルホールディングス
                                                
                                             | 
                                                インスペック㈱
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Number of shares | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,157
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                2,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                915,800
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                10,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                4,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                2,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                290,800
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,157
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,036,685,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                146,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                584,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                394,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,524,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Purpose of shareholding, overview of business alliance, quantitative effects of shareholding and reason for increase in number of shares | 
                                                (保有目的)業界動向把握のため保有。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)安定的な資金調達等の金融取引の関係強化。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)業界動向把握のため保有。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)安定的な資金調達等の金融取引の関係強化。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)エンターテインメント分野における企業間取引強化。(業務提携等の概要)エンターテインメント分野における遊技台の企画・開発力を向上させるため。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)業界動向把握のため保有。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)業界動向把握のため保有。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)業界動向把握のため保有。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)業界動向把握のため保有。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)業界動向把握のため保有。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)エンターテインメント分野における企業間取引強化。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)業界動向把握のため保有。(定量的な保有効果)(注)
                                                
                                             | 
                                                (保有目的)業界動向把握のため保有。(定量的な保有効果)(注)
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Whether issuer of aforementioned shares holds reporting company's shares | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                有
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | 
                                                無
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — |