| 18. Round | 13/06/2021 | Albirex Niigata | - | Fagiano Okayama | 0:1 | ||||
| 19. Round | 21/06/2021 | Blaublitz Akita | - | Albirex Niigata | 0:2 | ||||
| 20. Round | 26/06/2021 | Albirex Niigata | - | Mito HollyHock | 0:0 | ||||
| 21. Round | 03/07/2021 | Júbilo Iwata | - | Albirex Niigata | 3:2 | ||||
| 22. Round | 11/07/2021 | Albirex Niigata | - | Tochigi SC | 3:0 | ||||
| 23. Round | 17/07/2021 | Kyoto Sanga FC | - | Albirex Niigata | 1:1 | ||||
| 24. Round | 09/08/2021 | Albirex Niigata | - | RB Omiya Ardija | 2:2 | ||||
| 25. Round | 14/08/2021 | JEF United Chiba | - | Albirex Niigata | 0:0 | ||||
| 27. Round | 28/08/2021 | Mito HollyHock | - | Albirex Niigata | 4:0 |
Japan