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 | 
                                                9,320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,775,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,095,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,095,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,335,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,411,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,747,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,747,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |