Notes - Segment Information, Etc.
| Concept | 2024-03-01 to 2025-02-28 | 2024-03-01 to 2025-02-28 | 2024-03-01 to 2025-02-28 | 2024-03-01 to 2025-02-28 | 2024-03-01 to 2025-02-28 | 2024-03-01 to 2025-02-28 | 2024-03-01 to 2025-02-28 | 2024-03-01 to 2025-02-28 | 2023-03-01 to 2024-02-29 | 2023-03-01 to 2024-02-29 | 2023-03-01 to 2024-02-29 | 2023-03-01 to 2024-02-29 | 2023-03-01 to 2024-02-29 | 2023-03-01 to 2024-02-29 | 2023-03-01 to 2024-02-29 | 2023-03-01 to 2024-02-29 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                1,372,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                209,253,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                313,171,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                313,171,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,653,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                311,798,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,142,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                283,347,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                282,090,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                283,347,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,256,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                192,794,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,153,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                337,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,814,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,886,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                283,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,451,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,549,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,886,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,558,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,333,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,634,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,634,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                301,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,665,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                54,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,652,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,363,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,177,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                308,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,161,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,123,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                185,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,275,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,256,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,020,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                178,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,077,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,424,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                45,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,492,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,964,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,082,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                246,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,297,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,036,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,882,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,979,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,241,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,248,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,362,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                121,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,710,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                550,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |