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 | 
                                                2,162,401,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,457,108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,859,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,801,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,140,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,802,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                247,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,891,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,153,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,646,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,299,879,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,153,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                243,292,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                713,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                6,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                301,217,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                439,827,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                439,827,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,398,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                290,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                430,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,559,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                430,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,985,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                37,815,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,978,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                277,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                390,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                390,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,313,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                851,714,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                894,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,302,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                894,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |