Shareholdings
| Concept | As at 2024-06-30 | As at 2023-06-30 | 
|---|---|---|
| Shareholdings | ||
| Reporting company | ||
| Details of specified investment shares held for purposes other than pure investment | ||
| Issue | 
                                                川崎地質㈱
                                                
                                             | — | 
| Number of shares | 
                                                4,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                4,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Carrying amount | 
                                                11,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Purpose of shareholding, overview of business alliance, quantitative effects of shareholding and reason for increase in number of shares | 
                                                土壌・地下水事業の取引の安定的、長期的な維持・強化のため保有しております。定量的な保有効果は記載が困難であるため記載しておりません。保有の合理性はa.で記載の方法により検証しております。
                                                
                                             | — | 
| Whether issuer of aforementioned shares holds reporting company's shares | 
                                                有
                                                
                                             | — |