4. Round | 21/03/2021 | SC Sagamihara | - | Omiya Ardija | 2:1 | ||||
5. Round | 27/03/2021 | Omiya Ardija | - | V-Varen Nagasaki | 4:0 | ||||
6. Round | 03/04/2021 | FC Ryūkyū | - | Omiya Ardija | 0:0 | ||||
7. Round | 10/04/2021 | Blaublitz Akita | - | Omiya Ardija | 0:0 | ||||
15. Round | 23/05/2021 | Giravanz Kitakyushu | - | Omiya Ardija | 3:1 |