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 | 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 | 
                                                14,373,285,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,104,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,104,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,731,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,628,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,313,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,628,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,314,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                109,427,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                166,354,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,926,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -166,354,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                117,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                102,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -117,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,085,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                296,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                350,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                364,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,872,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                305,107,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                265,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                315,512,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                666,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                761,762,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                779,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                94,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,517,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                385,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                344,686,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                420,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |