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 | 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 | 
                                                13,622,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,955,828,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,942,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,723,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                569,133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,191,649,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,191,649,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,052,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,244,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,270,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,025,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,193,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,270,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,999,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                76,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                76,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                560,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                637,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -637,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                105,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                105,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                557,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                663,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -663,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                128,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,721,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,653,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                156,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                156,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                232,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,208,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                232,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,866,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |