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 | 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 | 
                                                12,370,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,632,212,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,261,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,632,212,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,050,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,954,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,050,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,095,657,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                72,206,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -74,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                873,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                166,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -166,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                165,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                566,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                908,865,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                341,968,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                908,865,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                855,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                313,541,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                855,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                541,957,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                403,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,111,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                708,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,111,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                814,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                423,966,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                814,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                390,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |