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 | 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 | 
                                                28,518,984,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,186,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                667,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                654,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,875,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,221,230,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||
| Depreciation | 
                                                1,323,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,368,430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,302,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,253,563,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                2,303,105,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,305,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,125,991,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,125,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |