Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                105,540,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,716,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                269,923,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                269,923,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                147,666,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,736,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                111,175,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                217,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                217,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,667,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                3,397,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                963,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,072,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,711,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,072,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,561,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,410,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,410,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                722,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                25,595,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                375,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,591,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,195,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,621,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                603,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,740,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,545,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,661,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                570,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,232,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                376,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                21,725,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                480,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,700,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,191,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,495,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,491,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,018,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                767,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,965,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                814,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,779,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                180,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |