Notes - Segment Information, Etc.
| Concept | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                27,593,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,297,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,860,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,860,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,969,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,891,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,766,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,223,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,414,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,638,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,820,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,820,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,820,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,297,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,297,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,297,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |