Directors (And Other Officers)
| Concept | 
                                    
                                        As at 2024-03-28  | 
                            
                                
                                    
                                        As at 2024-03-28  | 
                            
                                
                                    
                                        As at 2024-03-28  | 
                            
                                
                                    
                                        As at 2024-03-28  | 
                            
                                
                                    
                                        As at 2024-03-28  | 
                            
                                
                                    
                                        As at 2024-03-28  | 
                            
                                
                                    
                                        As at 2024-03-28  | 
                            
                                
                                    
                                        As at 2024-03-28  | 
                            
                        
|---|---|---|---|---|---|---|---|---|
| Directors (and other officers) | ||||||||
| Information about directors (and corporate auditors) | ||||||||
| Official title or position | 
                                        
                                             
                                                取締役
技術本部本部長
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                監査役
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役社長
(代表取締役)
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                監査役
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                常勤監査役
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                取締役
営業統括本部本部長
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Name | 
                                        
                                             
                                                柿原 秀規
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                長 伸幸
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                久野 幸男
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                加藤 久
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                松本 孝明
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                植田 正敬
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                宮田 正昭
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Date of birth | 
                                        
                                             
                                                1956-06-16
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1953-09-19
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1951-07-01
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1954-04-29
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1958-10-10
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1970-01-16
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1953-01-30
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Career summary | — | |||||||
| Term of office | 
                                        
                                             
                                                ※2
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                ※3
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                ※2
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                ※1
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                ※1
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                ※2
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                ※2
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Number of shares held (Ordinary shares) | 
                                        
                                             
                                                23,200
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                4,600
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                523,400
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                23,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                28,500
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                602,800
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             
                                        
                                     |