Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||||
| Segment information | ||||||||||||||
| Disclosure of sales and profit (loss) for each reportable segment | ||||||||||||||
| Sales | ||||||||||||||
| Revenues from external customers | 
                                                30,708,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,878,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                324,506,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                324,506,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                206,533,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                248,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                356,344,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,028,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,242,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                356,344,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,972,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                43,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,337,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,066,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,682,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,066,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,348,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,896,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,326,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,348,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |