Notes - Segment Information, Etc.
| Concept | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                15,721,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,619,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,290,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,291,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,619,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,521,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,357,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,373,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,656,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,656,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,403,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,408,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                128,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                598,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                193,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                394,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,812,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,812,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,224,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |