Employees
| Concept | 
                                    
                                        As at 2024-03-31  | 
                            
                        
|---|---|
| Employees | |
| Metrics related to human capital diversity | |
| Metrics of consolidated subsidiaries | |
| Consolidated subsidiaries | 
                                        
                                             
                                                アスク・サンシンエンジニアリング㈱
                                                
                                             
                                        
                                     | 
                                
                            
| Ratio of female employees in managerial positions | 
                                        
                                             
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Ratio of male employees taking childcare leave | |
| All employees | 
                                        
                                             
                                                0.333
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             
                                        
                                     |