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 | 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 | 
                                                4,161,540,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,306,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,306,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,144,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,069,641,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,538,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,468,475,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,538,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                901,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,631,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -16,631,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,197,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,658,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -21,658,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |