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 | 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 | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,224,221,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,120,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,896,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,120,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,120,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,284,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,284,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,284,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,566,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,717,967,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                1,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,577,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                170,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                168,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                186,396,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,674,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,385,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,010,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                86,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |