Directors (And Other Officers)
| Concept | 
                                    
                                        As at 2024-06-28  | 
                            
                                
                                    
                                        As at 2024-06-28  | 
                            
                                
                                    
                                        As at 2024-06-28  | 
                            
                                
                                    
                                        As at 2024-06-28  | 
                            
                                
                                    
                                        As at 2024-06-28  | 
                            
                                
                                    
                                        As at 2024-06-28  | 
                            
                                
                                    
                                        As at 2024-06-28  | 
                            
                        
|---|---|---|---|---|---|---|---|
| Directors (and other officers) | |||||||
| Information about directors (and corporate auditors) | |||||||
| Official title or position | — | 
                                        
                                             
                                                専務取締役
技術開発
推進部長
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役
経営管理部長
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                代表取締役
社   長
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役
(監査等委員)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役
(監査等委員)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役
(監査等委員)
                                                
                                             
                                        
                                     | 
                                
                            
| Name | — | 
                                        
                                             
                                                田子 薫
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                笹元 岳
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                石橋 健藏
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                小関 肇
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                神谷 宗之介
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                波光 史成
                                                
                                             
                                        
                                     | 
                                
                            
| Date of birth | — | 
                                        
                                             
                                                1955-08-04
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1970-11-01
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1968-11-09
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1960-09-22
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1974-06-25
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1969-09-05
                                                
                                             
                                        
                                     | 
                                
                            
| Career summary | — | ||||||
| Term of office | — | 
                                        
                                             
                                                (注)2
(注)4
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                (注)2
(注)5
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                (注)2
(注)4
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                (注)3
(注)4
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                (注)1
(注)3
(注)4
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                (注)1
(注)3
(注)4
                                                
                                             
                                        
                                     | 
                                
                            
| Number of shares held (Ordinary shares) | 
                                        
                                             
                                                1,493,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                18,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1,452,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                9,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                5,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                8,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     |