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 | 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 | 2023-04-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||
| Segment information | ||||||||||||
| Disclosure of sales and profit (loss) for each reportable segment | ||||||||||||
| Sales | ||||||||||||
| Revenues from external customers | 
                                                525,729,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                525,729,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,972,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                327,945,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                195,812,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                312,358,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                507,766,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                193,916,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                507,766,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,492,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                334,579,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                334,415,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -334,579,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                140,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                331,551,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -331,551,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                331,221,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |