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 | — | 
                                                中鋼運輸株式会社
                                                
                                             | 
                                                中国工業株式会社
                                                
                                             | 
| Address of shareholder | — | 
                                                広島県呉市広町田2-7-41
                                                
                                             | 
                                                広島市中区小町2-26
                                                
                                             | 
| Number of shares held in own name | 
                                                201,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                59,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                142,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Number of shares held in others' names | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Total number of shares held | 
                                                201,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                59,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                142,900
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
| Shareholding ratio | 
                                                0.0590
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0173
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0418
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |