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 | 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 | 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 | 
                                                22,541,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,063,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,321,260,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,321,260,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                257,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,155,287,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,366,685,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,756,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,136,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                899,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,037,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,037,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                243,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,793,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                1,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                327,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,376,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,048,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,376,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                323,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,235,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,232,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,232,915,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,047,276,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                185,639,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |