Directors (And Other Officers)
| Concept | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | As at 2025-06-23 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Directors (and other officers) | ||||||||||||
| Information about directors (and corporate auditors) | ||||||||||||
| Official title or position | 
                                                代表取締役社長
                                                
                                             | 
                                                取締役執行役員技術統括本部長
                                                
                                             | — | 
                                                監査役
                                                
                                             | 
                                                取締役
                                                
                                             | 
                                                取締役
                                                
                                             | 
                                                常勤監査役
                                                
                                             | 
                                                取締役執行役員営業統括本部長
                                                
                                             | 
                                                取締役常務執行役員 経営統括本部長
                                                
                                             | 
                                                取締役
                                                
                                             | 
                                                監査役
                                                
                                             | 
                                                取締役常務執行役員安全・技術業務
                                                
                                             | 
| Name | 
                                                廣 江 勝 志
                                                
                                             | 
                                                山 崎   広
                                                
                                             | — | 
                                                椎 野 友 教
                                                
                                             | 
                                                笠 間 裕 治
                                                
                                             | 
                                                小 山 裕 康
                                                
                                             | 
                                                福 村 宏 之
                                                
                                             | 
                                                中 村 健 司
                                                
                                             | 
                                                今 井 隆 博
                                                
                                             | 
                                                黒 柳 良 子
                                                
                                             | 
                                                福 田 郁 朗
                                                
                                             | 
                                                松 尾 友 明
                                                
                                             | 
| Date of birth | 
                                                1960-08-06
                                                
                                             | 
                                                1966-02-11
                                                
                                             | — | 
                                                1976-12-13
                                                
                                             | 
                                                1959-07-02
                                                
                                             | 
                                                1956-05-09
                                                
                                             | 
                                                1962-09-21
                                                
                                             | 
                                                1963-03-07
                                                
                                             | 
                                                1968-07-20
                                                
                                             | 
                                                1987-07-05
                                                
                                             | 
                                                1962-07-27
                                                
                                             | 
                                                1968-01-26
                                                
                                             | 
| Career summary | — | |||||||||||
| Term of office | 
                                                (注)3
                                                
                                             | 
                                                (注)3
                                                
                                             | — | 
                                                (注)5
                                                
                                             | 
                                                (注)3
                                                
                                             | 
                                                (注)3
                                                
                                             | 
                                                (注)4
                                                
                                             | 
                                                (注)3
                                                
                                             | 
                                                (注)3
                                                
                                             | 
                                                (注)3
                                                
                                             | 
                                                (注)5
                                                
                                             | 
                                                (注)3
                                                
                                             | 
| Number of shares held (Ordinary shares) | 
                                                67,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                16,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                131,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                2,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                44,000
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
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                                                        xbrli:shares
                                                    
                                                
                                             |