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 | — | 
                                                 東洋製綱株式会社
                                                
                                             | 
                                                 東京製綱株式会社
                                                
                                             | 
| Address of shareholder | — | 
                                                大阪府貝塚市浦田町175
                                                
                                             | 
                                                東京都江東区永代2丁目37番28号
                                                
                                             | 
| Number of shares held in own name | 
                                                559,200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                9,300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                549,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Number of shares held in others' names | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Total number of shares held | 
                                                559,200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                9,300
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                549,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Shareholding ratio | 
                                                0.0344
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0006
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0338
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |