Notes - Segment Information, Etc.
| Concept | 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 | 2021-05-01 to 2022-04-30 | 2021-05-01 to 2022-04-30 | 2021-05-01 to 2022-04-30 | 2021-05-01 to 2022-04-30 | 2021-05-01 to 2022-04-30 | 2021-05-01 to 2022-04-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                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
                                                    
                                                
                                             | 
                                                18,030,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                710,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,568,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,704,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,983,168,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                1,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                359,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                240,984,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                361,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                344,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,970,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                342,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                104,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                179,860,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,308,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,306,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,260,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,306,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |