Notes - Segment Information, Etc.
| Concept | 2023-10-01 to 2023-12-31 | 2023-10-01 to 2023-12-31 | 2023-10-01 to 2023-12-31 | 2023-10-01 to 2023-12-31 | 2023-10-01 to 2023-12-31 | 2022-10-01 to 2022-12-31 | 2022-10-01 to 2022-12-31 | 2022-10-01 to 2022-12-31 | 2022-10-01 to 2022-12-31 | 2022-10-01 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 | 
                                                3,480,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,839,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,839,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,359,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,449,896,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,182,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,449,896,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,267,761,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |