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 | 
                                                30,922,590,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,309,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,309,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                386,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,603,894,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,318,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,617,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,617,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,308,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,847,574,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,461,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                308,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -114,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -88,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |