Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 10/2021 |  | Toya Izumi | FW |  | Biwako Seikei College | Biwako Seikei College |
| 08/2021 |  | Bojan | FW | |||
| 08/2021 | | Yuya Ōsako | FW |  | Werder Bremen | Werder |
| 08/2021 | | Yoshinori Mutō | FW |  | Newcastle United | Newcastle |
| 03/2021 |  | Ayub Masika | FW | |||
| 02/2021 | | Tomo Sugawara | AS-CO | |||
| 01/2021 |  | Lincoln | FW |  | Flamengo RJ | Flamengo |
| 01/2021 | | Nagisa Sakurauchi | DF |  | Júbilo Iwata | Júbilo Iwata |
| 01/2021 | | Ryotaro Hironaga | GK |  | Sanfrecce Hiroshima | Sanfrecce |
| 01/2021 | | Yuki Kobayashi | DF |  | Yokohama FC | Yokohama FC |
| 01/2021 | | Shion Inoue | MF |  | Tokyo Verdy | Verdy |
| 01/2021 | | Asahi Masuyama | MF |  | Avispa Fukuoka | Avispa |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2021 | | Noriaki Fujimoto | FW |  | Shimizu S-Pulse | S-Pulse |
| 08/2021 | | Asahi Masuyama | MF |  | Oita Trinita | Oita Trinita |
| 07/2021 | | Kyōgo Furuhashi | FW |  | Celtic FC | Celtic |
| 07/2021 | | Takuya Yasui | MF |  | FC Machida Zelvia | Machida Zelvia |
| 01/2021 | | Kenshin Yoshimaru | GK |  | Giravanz Kitakyushu | Giravanz Kitakyushu |
| 01/2021 | | So Fujitani | DF | | Giravanz Kitakyushu | Giravanz Kitakyushu |
| 01/2021 | | Hirofumi Watanabe | DF |  | Renofa Yamaguchi | Renofa Yamaguchi |
| 01/2021 | | Daigo Nishi | DF |  | Urawa Red Diamonds | Red Diamonds |
| 01/2021 | | Keijiro Ogawa | FW | | Yokohama FC | Yokohama FC |