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 | 
                                                11,168,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,540,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,168,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,702,695,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,976,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,199,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                666,187,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,536,841,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                747,023,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,290,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,672,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,273,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,290,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                315,668,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -315,668,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,881,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -284,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                261,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                284,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |