Treasury Shares, Etc.
| Concept | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | 
|---|---|---|---|
| Treasury shares, etc. | |||
| Treasury shares, etc. | |||
| Name of shareholder | — | 
                                                日本設備工業株式会社
                                                
                                             | 
                                                高砂熱学工業株式会社
                                                
                                             | 
| Address of shareholder | — | 
                                                東京都中央区日本橋箱崎町36番2号
                                                
                                             | 
                                                東京都新宿区新宿6丁目27番30号
                                                
                                             | 
| Number of shares held in own name | 
                                                3,375,800
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                777,300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                2,598,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Number of shares held in others' names | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Total number of shares held | 
                                                3,375,800
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                777,300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                2,598,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Shareholding ratio | 
                                                0.0480
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0110
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0369
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |