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 | 
                                                71,753,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,484,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                731,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,106,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,463,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,204,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,979,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,416,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,831,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,481,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                749,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                5,847,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,222,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                374,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,869,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                802,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,176,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,525,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,014,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                657,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,481,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,153,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                371,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |