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 and profit (loss) for each reportable segment | ||||||||||
| Sales | ||||||||||
| Revenues from external customers | 
                                                19,592,603,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,075,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,261,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,804,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,450,424,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,306,365,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,988,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,696,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,374,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,247,763,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                1,099,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                728,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                321,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,256,138,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                334,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,321,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                830,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,328,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |