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 | 
                                                148,572,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                148,572,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,449,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,334,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,344,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,444,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                141,660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                141,660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,755,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,033,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,468,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,401,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                13,632,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,632,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                234,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,137,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,978,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                281,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,892,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,892,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                220,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                372,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,634,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,665,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |