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 and profit (loss) for each reportable segment | ||||||||||||||
| Sales | ||||||||||||||
| Revenues from external customers | 
                                                81,929,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,707,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,627,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,302,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,778,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,707,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,737,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,824,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,651,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,737,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,475,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,261,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,011,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,011,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,011,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,413,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,413,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,413,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |