Notes - Segment Information, Etc.
| Concept | 2024-10-01 to 2025-03-31 | 2024-10-01 to 2025-03-31 | 2024-10-01 to 2025-03-31 | 2024-10-01 to 2025-03-31 | 2024-10-01 to 2025-03-31 | 2024-10-01 to 2025-03-31 | 2023-10-01 to 2024-03-31 | 2023-10-01 to 2024-03-31 | 2023-10-01 to 2024-03-31 | 2023-10-01 to 2024-03-31 | 2023-10-01 to 2024-03-31 | 2023-10-01 to 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||
| Segment information | ||||||||||||
| Disclosure of sales, profit (loss), asset, liability, and other items for each reportable segment | ||||||||||||
| Sales | ||||||||||||
| Revenues from external customers | 
                                                35,823,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,097,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,878,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,847,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,823,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,496,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,760,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,196,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,488,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,628,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,628,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,534,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,534,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,322,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                132,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |