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 | 
                                                179,526,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,469,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,824,835,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,841,738,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,105,454,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                228,845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,824,835,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,543,417,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                232,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,840,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                448,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,543,417,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,601,257,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,420,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                56,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                682,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,524,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -100,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -83,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,462,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                787,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                18,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                207,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                676,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                111,635,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                256,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                719,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,985,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                657,941,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,804,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                242,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,147,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                703,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,602,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                186,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                447,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                955,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                472,959,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                973,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,071,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,138,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,104,371,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,733,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                713,970,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |