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 | 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 | 
                                                7,841,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                328,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,608,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,438,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,608,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,730,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,057,828,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,372,181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,730,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,656,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                156,540,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                233,745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                193,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                176,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                116,556,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                167,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,440,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                260,918,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                101,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                434,175,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                392,799,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                637,516,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                405,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                95,206,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                616,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                116,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |