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 | 
                                                666,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,443,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,859,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,132,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,616,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                502,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,635,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,773,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,641,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,717,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,210,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,457,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                161,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,376,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                684,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,530,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |