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 | 
                                                2,720,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,633,842,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,913,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,633,842,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,784,945,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,533,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,318,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,318,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                35,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                108,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -108,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,811,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -109,699,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,699,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                19,357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,406,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,405,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,425,078,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,235,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,238,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,256,651,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                38,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,963,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,938,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,976,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,191,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,129,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -77,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,206,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |