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 | 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 | 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 | 
                                                31,670,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,313,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,441,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,948,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,341,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,395,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,278,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,178,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,280,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,046,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,914,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,337,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,027,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,514,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,765,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                2,579,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,716,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                632,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,631,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                163,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,241,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                491,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                162,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,480,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,190,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |