Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 12/2020 |  | Jiro Nakamura | MF |  | Gamba Osaka U18 | U18 |
| 04/2020 | | Yota Sato | DF |  | Meiji University FC | Meiji University FC |
| 03/2020 |  | Yun-oh Lee | GK | |||
| 02/2020 | | Gen Shōji | DF |  | Toulouse FC | Toulouse |
| 02/2020 | | Won-ho Shin | DF |  | Boin High School | Boin HS |
| 02/2020 |  | Jefferson Tabinas | DF |  | FC Gifu | FC Gifu |
| 02/2020 | | Shuhei Kawasaki | FW | | Gamba Osaka U18 | U18 |
| 01/2020 | | Kei Ishikawa | GK |  | Sagan Tosu | Sagan |
| 01/2020 | | Ryo Shinzato | DF |  | Júbilo Iwata | Júbilo Iwata |
| 01/2020 | | Jun Ichimori | GK |  | Fagiano Okayama | Fagiano Okayama |
| 01/2020 | | Haruki Saruta | GK |  | Kagoshima United | Kagoshima |
| 01/2020 | | Soo-yong Bae | DF |  | Kamatamare Sanuki | Kamatamare Sanuki |
| 01/2020 | | Jae-suk Oh | DF |  | FC Tokyo | FC Tokyo |
| 01/2020 | | Mizuki Ichimaru | MF | | FC Gifu | FC Gifu |
| 01/2020 | | Yuji Ono | MF | | Sagan Tosu | Sagan |
| 01/2020 | | Shoji Toyama | FW | | Gamba Osaka U18 | U18 |
| 01/2020 | | Dai Tsukamoto | FW |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 10/2020 | | Yasuhito Endō | MF | | Júbilo Iwata | Júbilo Iwata |
| 08/2020 | | Mizuki Ichimaru | MF |  | FC Ryūkyū | FC Ryūkyū |
| 07/2020 | | Jae-suk Oh | DF |  | Nagoya Grampus | Nagoya Grampus |
| 02/2020 | | Soo-yong Bae | DF |  | Chungnam Asan FC | Chungnam Asan |
| 01/2020 |  | Markel Susaeta | MF |  | Melbourne City FC | Melbourne City |
| 01/2020 | | Ken Tajiri | GK |  | Gainare Tottori | Gainare Tottori |
| 01/2020 | | Naoaki Aoyama | DF | | Kagoshima United | Kagoshima |
| 01/2020 | | Mizuki Hayashi | GK |  | Renofa Yamaguchi | Renofa Yamaguchi |
| 01/2020 | | Kōsei Tani | GK |  | Shonan Bellmare | Shonan Bellmare |
| 01/2020 | | Yuto Suzuki | MF |  | Matsumoto Yamaga | Matsumoto Yamaga |
| 01/2020 | | Concha | FW |  | Real Sociedad | Real Sociedad |