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 and profit (loss) for each reportable segment | ||||||||||||
| Sales | ||||||||||||
| Revenues from external customers | 
                                                18,132,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,132,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,554,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,308,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,269,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,878,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,110,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,181,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,586,054,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,878,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                709,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -709,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                707,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -769,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                769,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                769,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |