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 | 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 | 
                                                14,604,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,467,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,605,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,258,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,467,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,556,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,767,577,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,715,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,039,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,039,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                196,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,140,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                696,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                247,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,140,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                648,963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                195,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                208,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,053,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,053,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |