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 | 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 | 
                                                1,054,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,297,303,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,635,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,837,887,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,595,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                892,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,379,637,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,527,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                356,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,854,407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,650,208,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                30,023,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,689,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,977,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | |||||||||||||
| Depreciation | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                134,199,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,058,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                24,424,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                167,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,401,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,803,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |