Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2021 |  | Hiroto Yamami | FW |  | Kwansei Gakuin University | Kwansei Gakuin University |
| 07/2021 | | Ko Yanagisawa | DF |  | Mito HollyHock | Mito HollyHock |
| 06/2021 | | Masanobu Matsunami | MA | |||
| 03/2021 |  | Wellington Silva | FW |  | Fluminense RJ | Fluminense |
| 03/2021 | | Taichi Kato | GK |  | Ehime FC | Ehime FC |
| 02/2021 | | Mitsumasa Yoda | AS-CO | | Mito HollyHock | Mito HollyHock |
| 01/2021 | | Tiago Alves | FW |  | Sagan Tosu | Sagan |
| 01/2021 | | Leandro Pereira | FW |  | Matsumoto Yamaga | Matsumoto Yamaga |
| 01/2021 |  | Se-jong Ju | MF |  | FC Seoul | FC Seoul |
| 01/2021 | | Mizuki Hayashi | GK |  | Renofa Yamaguchi | Renofa Yamaguchi |
| 01/2021 | | Kazunari Ichimi | FW |  | Yokohama FC | Yokohama FC |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2021 | | Shuhei Kawasaki | FW |  | Portimonense SC | Portimonense SC |
| 08/2021 | | Kazunari Ichimi | FW |  | Tokushima Vortis | Tokushima Vortis |
| 02/2021 |  | Jefferson Tabinas | DF | | Mito HollyHock | Mito HollyHock |
| 02/2021 | | Ren Shibamoto | MF |  | SC Sagamihara | SC Sagamihara |
| 02/2021 | | Satoshi Yamaguchi | AS-CO |  | Shonan Bellmare | Shonan Bellmare |
| 01/2021 | | Riku Matsuda | DF |  | Zweigen Kanazawa | Zweigen Kanazawa |
| 01/2021 | | Tatsuya Yamaguchi | DF |  | Tokyo Verdy | Verdy |
| 01/2021 | | Daisuke Takagi | FW | | Renofa Yamaguchi | Renofa Yamaguchi |
| 01/2021 | | Kazuma Watanabe | FW | | Yokohama FC | Yokohama FC |
| 01/2021 | | Yun-oh Lee | GK |  | Vegalta Sendai | Vegalta Sendai |
| 01/2021 | | Ryo Shinzato | DF |  | Júbilo Iwata | Júbilo Iwata |
| 01/2021 | | Haruki Saruta | GK | | Yokohama FC | Yokohama FC |
| 01/2021 | | Shoji Toyama | FW | | Ehime FC | Ehime FC |