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 and profit (loss) for each reportable segment | ||||||||||||||||
| Sales | ||||||||||||||||
| Revenues from external customers | 
                                                51,453,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,486,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,168,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,800,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                260,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,008,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,527,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,702,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,502,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,502,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,238,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                264,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                822,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,040,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,219,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,094,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                273,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,094,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                338,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -338,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                268,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |