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 | 
                                                6,993,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,437,509,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,663,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,227,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,443,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,663,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,195,914,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,279,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                252,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,083,228,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,531,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,531,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                26,382,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                219,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                349,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                129,576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                193,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -349,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                206,614,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                234,367,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                125,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -360,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                360,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                58,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,224,378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,257,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,717,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,165,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,375,531,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                118,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,283,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,339,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,069,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,436,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,371,530,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                48,977,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,439,925,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,448,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,390,947,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,483,899,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,778,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,543,780,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,568,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                288,952,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,857,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,568,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |