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 | 
                                                16,088,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,142,218,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,142,218,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,054,001,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,615,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,988,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,604,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,604,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                76,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                486,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -486,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                409,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                347,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                446,206,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -446,206,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                209,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                287,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                357,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                67,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                191,738,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                259,083,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                317,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |