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 | 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 | 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 | 
                                                5,310,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,421,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,638,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,686,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,048,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,663,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,686,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,243,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,797,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,888,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,348,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,471,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,460,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,202,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,819,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,819,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                87,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                106,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,003,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,728,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                460,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                152,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,380,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,587,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                179,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||||
| Depreciation | 
                                                111,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                487,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                588,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                292,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                768,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                179,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                356,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                958,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                211,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                168,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,245,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,076,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                92,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                275,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                298,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                380,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                134,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                104,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                481,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                252,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                123,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                103,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                637,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                534,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |