Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 09/2021 |  | Tsubasa Terayama | MF |  | Juntendo University | Juntendo University |
| 09/2021 | | Hisatoshi Nishido | MF |  | Waseda University | Waseda University |
| 09/2021 | | Yūto Nagatomo | DF | |||
| 07/2021 | | Junya Suzuki | DF |  | Blaublitz Akita | Blaublitz Akita |
| 06/2021 | | Shuto Okaniwa | DF |  | Meiji University FC | Meiji University FC |
| 05/2021 | | Kojiro Yasuda | MF |  | FC Tokyo U18 | U18 |
| 01/2021 |  | Bruno Uvini | DF | |||
| 01/2021 | | Noboyuki Abe | GK |  | AC Nagano Parceiro | Nagano Parceiro |
| 01/2021 | | Takuya Aoki | MF |  | Urawa Red Diamonds | Red Diamonds |
| 01/2021 | | Leandro | FW |  | Kashima Antlers | Kashima Antlers |
| 01/2021 | | Sho Morita | DF | | FC Tokyo U18 | U18 |
| 01/2021 | | Yuki Kajiura | MF | | FC Tokyo U18 | U18 |
| 01/2021 | | Ryoma Watanabe | MF |  | Montedio Yamagata | Montedio Yamagata |
| 01/2021 |  | Sang-ho Na | FW |  | Seongnam FC | Seongnam FC |
| 01/2021 | | Leon Nozawa | FW | | FC Tokyo U18 | U18 |
| 01/2021 | | Shota Yamashita | GK-CO | | FC Tokyo U18 | U18 |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2021 | | Taishi Nozawa | GK |  | Iwate Grulla Morioka | Grulla Morioka |
| 02/2021 | | Taichi Hara | FW |  | NK Istra 1961 | Istra 1961 |
| 02/2021 | | Tetsu Nagasawa | AS-CO |  | Kyoto Sanga FC | Kyoto |
| 01/2021 | | Sang-ho Na | FW |  | FC Seoul | FC Seoul |
| 01/2021 | | Kiichi Yajima | FW |  | RB Omiya Ardija | RB Omiya Ardija |
| 01/2021 | | Leandro | FW | | Kashima Antlers | Kashima Antlers |
| 01/2021 | | Ko Shimura | GK |  | Júbilo Iwata | Júbilo Iwata |
| 01/2021 | | Seiji Kimura | DF | | Kyoto Sanga FC | Kyoto |
| 01/2021 | | Rei Hirakawa | MF |  | Matsumoto Yamaga | Matsumoto Yamaga |
| 01/2021 | | Takayoshi Amma | AS-CO |  | FC Gifu | FC Gifu |