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 | 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 | 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 | 
                                                6,838,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,966,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                134,024,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                179,922,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,203,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                179,922,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                125,980,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,494,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                171,345,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,085,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                171,345,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                828,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                214,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,025,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,315,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,980,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                596,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,980,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                225,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                816,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,507,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                791,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,507,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                875,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,533,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,640,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                323,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,330,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                690,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                720,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,552,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                870,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,665,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                263,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,402,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                3,750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,987,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,484,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,891,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,646,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,001,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,573,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,871,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,363,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,390,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                190,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                388,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |