1. Round | 28/02/2021 | Mito HollyHock | - | Omiya Ardija | 1:2 | ||||
2. Round | 06/03/2021 | Omiya Ardija | - | Ventforet Kofu | 0:2 | ||||
4. Round | 21/03/2021 | SC Sagamihara | - | Omiya Ardija | 2:1 | ||||
3. Round | 24/03/2021 | Omiya Ardija | - | Kyoto Sanga FC | 1:2 | ||||
8. Round | 17/04/2021 | Omiya Ardija | - | Ehime FC | 0:1 | ||||
9. Round | 21/04/2021 | Júbilo Iwata | - | Omiya Ardija | 3:2 | ||||
10. Round | 25/04/2021 | Omiya Ardija | - | FC Machida Zelvia | 0:1 | ||||
12. Round | 05/05/2021 | Omiya Ardija | - | Albirex Niigata | 2:3 | ||||
18. Round | 13/06/2021 | Omiya Ardija | - | Tochigi SC | 1:1 | ||||
22. Round | 11/07/2021 | V-Varen Nagasaki | - | Omiya Ardija | 1:1 | ||||
23. Round | 18/07/2021 | Omiya Ardija | - | FC Ryūkyū | 2:2 | ||||
24. Round | 09/08/2021 | Albirex Niigata | - | Omiya Ardija | 2:2 | ||||
29. Round | 12/09/2021 | Ehime FC | - | Omiya Ardija | 3:3 | ||||
30. Round | 18/09/2021 | Ventforet Kofu | - | Omiya Ardija | 1:0 | ||||
31. Round | 25/09/2021 | Omiya Ardija | - | SC Sagamihara | 1:0 | ||||
32. Round | 03/10/2021 | Tochigi SC | - | Omiya Ardija | 1:3 | ||||
33. Round | 09/10/2021 | Omiya Ardija | - | Zweigen Kanazawa | 2:2 |