Notes - Segment Information, Etc.
| Concept | 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 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                7,430,105,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,548,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,118,804,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,548,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,834,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,456,073,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,378,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,834,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                519,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                676,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                123,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                552,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                738,805,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                702,907,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                102,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                841,069,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |