Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 10/2021 |  | Toshihiro Hattori | MA | |||
| 08/2021 | | Ryota Kobayashi | MF |  | Júbilo Iwata U18 | U18 |
| 07/2021 | | Ryo Takano | DF |  | Yokohama F. Marinos | Marinos |
| 07/2021 | | Makito Ito | DF | | Yokohama F. Marinos | Marinos |
| 07/2021 | | Shota Kaneko | MF |  | Shimizu S-Pulse | S-Pulse |
| 06/2021 | | Kensuke Fujiwara | MF | | Júbilo Iwata U18 | U18 |
| 04/2021 |  | Alexei Koșelev | GK |  | Fortuna Sittard | Fortuna Sittard |
| 01/2021 |  | Fabián González | FW |  | Atlético Nacional | Atl. Nacional |
| 01/2021 | | Yūki Ōtsu | FW | | Yokohama F. Marinos | Marinos |
| 01/2021 | | Chiharu Kato | DF |  | AC Kajaani | AC Kajaani |
| 01/2021 | | Naoki Kanuma | MF |  | SC Sagamihara | SC Sagamihara |
| 01/2021 | | Ryo Shinzato | DF |  | Gamba Osaka | Gamba |
| 01/2021 | | Ko Shimura | GK |  | FC Tokyo | FC Tokyo |
| 01/2021 | | Kohei Oka | DF | | Júbilo Iwata U18 | U18 |
| 01/2021 | | Yuto Suzuki | MF |  | Matsumoto Yamaga | Matsumoto Yamaga |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2021 | | Shun Obu | DF |  | Thespa Gunma | Thespa |
| 07/2021 | | Hiroki Itō | DF |  | VfB Stuttgart II | VfB II |
| 03/2021 |  | Juan Forlín | DF |  | CF Badalona Futur | Badalona Futur |
| 02/2021 | | Ko Shimura | GK |  | Giravanz Kitakyushu | Giravanz Kitakyushu |
| 02/2021 | | Ryo Shinzato | DF |  | V-Varen Nagasaki | V-Varen |
| 01/2021 | | Ryoma Ishida | DF | | SC Sagamihara | SC Sagamihara |
| 01/2021 | | Nagisa Sakurauchi | DF |  | Vissel Kobe | Vissel Kobe |
| 01/2021 | | Seiya Nakano | FW |  | RB Omiya Ardija | RB Omiya Ardija |
| 01/2021 | | Kakeru Funaki | DF | | SC Sagamihara | SC Sagamihara |
| 01/2021 | | Rikiya Uehara | MF |  | Vegalta Sendai | Vegalta Sendai |