Directors (And Other Officers)
| Concept | 
                                    
                                        As at 2025-06-25  | 
                            
                                
                                    
                                        As at 2025-06-25  | 
                            
                                
                                    
                                        As at 2025-06-25  | 
                            
                                
                                    
                                        As at 2025-06-25  | 
                            
                                
                                    
                                        As at 2025-06-25  | 
                            
                                
                                    
                                        As at 2025-06-25  | 
                            
                        
|---|---|---|---|---|---|---|
| Directors (and other officers) | ||||||
| Information about directors (and corporate auditors) | ||||||
| Official title or position | 
                                        
                                             
                                                代表取締役社長
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役
(監査等委員)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役
(監査等委員)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                常務取締役
営業部長
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役
(監査等委員)
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Name | 
                                        
                                             
                                                河合  映治
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                鈴木  祐人
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                高城 勝信
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                岩間  靖
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                片岡  憲明
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Date of birth | 
                                        
                                             
                                                1967-09-07
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1967-09-10
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1973-06-09
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1968-05-02
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1977-03-21
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Career summary | — | |||||
| Term of office | 
                                        
                                             
                                                (注)2
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                (注)3
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                (注)3
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                (注)2
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                (注)3
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Number of shares held (Ordinary shares) | 
                                        
                                             
                                                504,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                240,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                744,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     |