| 1. Round | 28/02/2021 | JEF United Chiba | - | Ventforet Kofu | 1:1 | ||||
| 2. Round | 07/03/2021 | Ehime FC | - | JEF United Chiba | 1:1 | ||||
| 3. Round | 14/03/2021 | JEF United Chiba | - | Blaublitz Akita | 0:2 | ||||
| 4. Round | 21/03/2021 | Matsumoto Yamaga | - | JEF United Chiba | 0:1 | ||||
| 5. Round | 27/03/2021 | JEF United Chiba | - | FC Ryūkyū | 1:2 | ||||
| 6. Round | 04/04/2021 | Kyoto Sanga FC | - | JEF United Chiba | 2:1 | ||||
| 7. Round | 11/04/2021 | Zweigen Kanazawa | - | JEF United Chiba | 0:1 | ||||
| 8. Round | 17/04/2021 | JEF United Chiba | - | Tochigi SC | 0:0 | ||||
| 9. Round | 21/04/2021 | Mito HollyHock | - | JEF United Chiba | 0:1 | ||||
| 11. Round | 01/05/2021 | Albirex Niigata | - | JEF United Chiba | 2:0 | ||||
| 14. Round | 15/05/2021 | V-Varen Nagasaki | - | JEF United Chiba | 2:2 | ||||
| 15. Round | 23/05/2021 | JEF United Chiba | - | FC Machida Zelvia | 1:1 | ||||
| 16. Round | 29/05/2021 | RB Omiya Ardija | - | JEF United Chiba | 0:2 | ||||
| 17. Round | 06/06/2021 | JEF United Chiba | - | Montedio Yamagata | 1:1 | ||||
| 18. Round | 13/06/2021 | JEF United Chiba | - | Tokyo Verdy | 0:1 | ||||
| 24. Round | 09/08/2021 | Montedio Yamagata | - | JEF United Chiba | 3:1 |
Japan