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 | 
                                                11,820,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,196,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,175,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,175,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,158,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,175,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,761,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,761,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,761,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,428,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,794,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,538,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                370,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                128,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                796,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,932,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,227,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,227,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,390,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                852,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,243,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,243,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                336,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,960,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                634,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                439,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,330,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                244,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,138,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,157,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,138,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                529,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                427,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments in entities accounted for using equity method | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,226,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,226,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,213,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,213,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                2,030,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                708,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,563,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,560,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                821,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,560,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,013,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,021,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,013,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                696,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                426,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |