Notes - Property, Plant And Equipment
| Concept | 
                                    
                                        As at 2024-09-30  | 
                            
                                
                                    
                                        As at 2024-03-31  | 
                            
                        
|---|---|---|
| Notes - Property, plant and equipment | ||
| Components of property, plant and equipment | ||
| Carrying amount | ||
| Property, plant and equipment | 
                                        
                                             
                                                27,943,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                28,935,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             
                                        
                                     |