1. Round | 28/02/2021 | Mito HollyHock | - | Omiya Ardija | 1:2 | ||||
2. Round | 06/03/2021 | Omiya Ardija | - | Ventforet Kofu | 0:2 | ||||
3. Round | 24/03/2021 | Omiya Ardija | - | Kyoto Sanga FC | 1:2 | ||||
5. Round | 27/03/2021 | Omiya Ardija | - | V-Varen Nagasaki | 4:0 | ||||
6. Round | 03/04/2021 | FC Ryūkyū | - | Omiya Ardija | 0:0 | ||||
18. Round | 13/06/2021 | Omiya Ardija | - | Tochigi SC | 1:1 | ||||
19. Round | 19/06/2021 | Matsumoto Yamaga | - | Omiya Ardija | 0:0 | ||||
20. Round | 27/06/2021 | Renofa Yamaguchi | - | Omiya Ardija | 0:1 | ||||
21. Round | 03/07/2021 | Omiya Ardija | - | Montedio Yamagata | 1:3 | ||||
22. Round | 11/07/2021 | V-Varen Nagasaki | - | Omiya Ardija | 1:1 | ||||
23. Round | 18/07/2021 | Omiya Ardija | - | FC Ryūkyū | 2:2 |