Treasury Shares, Etc.
| Concept | As at 2025-03-31 | As at 2025-03-31 | 
|---|---|---|
| Treasury shares, etc. | ||
| Treasury shares, etc. | ||
| Name of shareholder | — | 
                                                日比谷総合設備株式会社
                                                
                                             | 
| Address of shareholder | — | 
                                                東京都港区三田3-5-27
                                                
                                             | 
| Number of shares held in own name | 
                                                1,643,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,643,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Number of shares held in others' names | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Total number of shares held | 
                                                1,643,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                1,643,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Shareholding ratio | 
                                                0.0692
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0692
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |