Shareholdings
| Concept | As at 2025-03-31 | As at 2024-03-31 | 
|---|---|---|
| Shareholdings | ||
| Reporting company | ||
| Details of specified investment shares held for purposes other than pure investment | ||
| Issue | 
                                                杉田エース㈱
                                                
                                             | — | 
| Number of shares | 
                                                22,700
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                22,700
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                28,079,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,463,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Purpose of shareholding, overview of business alliance, quantitative effects of shareholding and reason for increase in number of shares | 
                                                製品の販売を行う企業との取引関係の維持・強化に資するため
                                                
                                             | — | 
| Whether issuer of aforementioned shares holds reporting company's shares | 
                                                有
                                                
                                             | — |