4. Round | 21/03/2021 | SC Sagamihara | - | Omiya Ardija | 2:1 | ||||
13. Round | 09/05/2021 | Thespakusatsu Gunma | - | Omiya Ardija | 1:1 | ||||
14. Round | 16/05/2021 | Omiya Ardija | - | Fagiano Okayama | 0:0 | ||||
15. Round | 23/05/2021 | Giravanz Kitakyushu | - | Omiya Ardija | 3:1 | ||||
16. Round | 29/05/2021 | Omiya Ardija | - | JEF United Chiba | 0:2 | ||||
17. Round | 06/06/2021 | Zweigen Kanazawa | - | Omiya Ardija | 1:0 |