| 6. Round | 16/05/2021 | Kashiwa Reysol [U18] | - | Urawa Red Diamonds [U18] | 2:2 | ||||
| 12. Round | 13/11/2021 | Kashiwa Reysol [U18] | - | Omiya Ardija [U18] | 5:0 | ||||
| 17. Round | 28/11/2021 | Kashiwa Reysol [U18] | - | Aomori Yamada High School [U18] | 1:4 | ||||
| 18. Round | 05/12/2021 | Ichiritsu Funabashi High School [U18] | - | Kashiwa Reysol [U18] | 3:2 |
Japan