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 | 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 | 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 | 
                                                3,105,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,824,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,912,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,488,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,457,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,788,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,788,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,401,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,146,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,948,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,127,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,954,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                263,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                129,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                258,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                714,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -714,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                97,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                340,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |