Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||
| Segment information | ||||||||||
| Disclosure of sales, profit (loss), asset, liability, and other items for each reportable segment | ||||||||||
| Sales | ||||||||||
| Revenues from external customers | 
                                                23,363,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                902,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,175,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,391,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,950,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,621,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                896,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,311,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,511,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,681,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                14,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                502,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                186,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |