| 10. Jornada | 25.04.2021 | RB Omiya Ardija | - | FC Machida Zelvia | 0:1 | ||||
| 16. Jornada | 29.05.2021 | RB Omiya Ardija | - | JEF United Chiba | 0:2 | ||||
| 17. Jornada | 06.06.2021 | Zweigen Kanazawa | - | RB Omiya Ardija | 1:0 | ||||
| 19. Jornada | 19.06.2021 | Matsumoto Yamaga | - | RB Omiya Ardija | 0:0 |  |
|||
| 24. Jornada | 09.08.2021 | Albirex Niigata | - | RB Omiya Ardija | 2:2 | ||||
| 25. Jornada | 14.08.2021 | RB Omiya Ardija | - | Blaublitz Akita | 1:1 | ||||
| 27. Jornada | 29.08.2021 | RB Omiya Ardija | - | Matsumoto Yamaga | 4:0 | ||||
| 28. Jornada | 05.09.2021 | RB Omiya Ardija | - | Tokyo Verdy | 2:1 | ||||
| 29. Jornada | 12.09.2021 | Ehime FC | - | RB Omiya Ardija | 3:3 | ||||
| 30. Jornada | 18.09.2021 | Ventforet Kofu | - | RB Omiya Ardija | 1:0 | ||||
| 32. Jornada | 03.10.2021 | Tochigi SC | - | RB Omiya Ardija | 1:3 | ||||
| 33. Jornada | 09.10.2021 | RB Omiya Ardija | - | Zweigen Kanazawa | 2:2 | ||||
| 38. Jornada | 07.11.2021 | RB Omiya Ardija | - | Renofa Yamaguchi | 1:2 | ||||
| 39. Jornada | 14.11.2021 | Montedio Yamagata | - | RB Omiya Ardija | 2:2 | ||||
| 41. Jornada | 28.11.2021 | FC Machida Zelvia | - | RB Omiya Ardija | 0:0 |
Japón