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 | 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 | 
                                                1,884,641,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,684,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,631,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,278,367,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,294,702,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                227,170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,316,657,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,824,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,230,101,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                222,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,105,785,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,421,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,077,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,651,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                10,268,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                614,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,512,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,046,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                497,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                632,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                455,899,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                559,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,022,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                577,212,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                3,845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,083,887,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,258,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,209,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                865,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                145,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,086,146,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                299,639,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                510,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                134,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                513,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |