Notes - Segment Information, Etc.
| Concept | 2023-05-01 to 2024-04-30 | 2023-05-01 to 2024-04-30 | 2023-05-01 to 2024-04-30 | 2023-05-01 to 2024-04-30 | 2023-05-01 to 2024-04-30 | 2023-05-01 to 2024-04-30 | 2022-05-01 to 2023-04-30 | 2022-05-01 to 2023-04-30 | 2022-05-01 to 2023-04-30 | 2022-05-01 to 2023-04-30 | 2022-05-01 to 2023-04-30 | 2022-05-01 to 2023-04-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                14,855,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,376,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,326,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,610,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                860,517,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,814,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,888,851,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,630,838,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                729,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,528,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,941,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                28,502,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                378,957,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                376,987,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                104,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                244,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,970,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                359,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                240,984,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                361,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                53,287,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,208,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,208,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,533,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,979,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                104,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                179,860,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |