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 | 
                                                9,136,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,136,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,081,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,055,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,430,105,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,548,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,118,804,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,548,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                603,895,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                739,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                567,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                135,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                519,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                676,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                123,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                552,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |