Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 11/2017 |  | Rei Hirakawa | MF |  | FC Tokyo U18 | U18 |
| 07/2017 |  | Hyun-soo Jang | DF |  | Guangzhou City | Guangzhou City |
| 07/2017 |  | Jakkit Wechpirom | FW |  | Bangkok United | Bangkok United |
| 07/2017 |  | Lipe | MF | |||
| 05/2017 | | Takefusa Kubo | FW | | FC Tokyo U18 | U18 |
| 03/2017 |  | Peter Utaka | FW |  | Sanfrecce Hiroshima | Sanfrecce |
| 02/2017 | | Riku Hirosue | GK | |||
| 02/2017 |  | Juan Miret | GK-CO | |||
| 01/2017 | | Yojiro Takahagi | MF |  | FC Seoul | FC Seoul |
| 01/2017 | | Kosuke Ota | DF |  | Vitesse | Vitesse |
| 01/2017 | | Yoshito Okubo | FW |  | Kawasaki Frontale | Frontale |
| 01/2017 | | Shuichi Gonda | GK |  | SV Horn | SV Horn |
| 01/2017 | | Go Hatano | GK | | FC Tokyo U18 | U18 |
| 01/2017 | | Akihiro Hayashi | GK |  | Sagan Tosu | Sagan |
| 01/2017 | | Takuo Ōkubo | GK |  | V-Varen Nagasaki | V-Varen |
| 01/2017 | | Makoto Okazaki | DF | | FC Tokyo U18 | U18 |
| 01/2017 | | Takuya Uchida | MF | | FC Tokyo U18 | U18 |
| 01/2017 | | Kensuke Nagai | FW |  | Nagoya Grampus | Nagoya Grampus |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2017 | | Hiroki Kawano | MF | | Sagan Tosu | Sagan |
| 07/2017 | | Takuma Abe | FW |  | Ulsan HD FC | Ulsan HD FC |
| 07/2017 |  | Nathan Burns | MF | | Sanfrecce Hiroshima | Sanfrecce |
| 02/2017 | | Shuichi Gonda | GK | | Sagan Tosu | Sagan |
| 01/2017 | | Yota Akimoto | GK |  | Shonan Bellmare | Shonan Bellmare |
| 01/2017 | | Kentaro Kakoi | GK |  | Cerezo Osaka | Cerezo |
| 01/2017 | | Hideto Takahashi | DF |  | Vissel Kobe | Vissel Kobe |
| 01/2017 | | Kota Mizunuma | MF | | Cerezo Osaka | Cerezo |
| 01/2017 | | Hideyuki Nozawa | MF |  | FC Gifu | FC Gifu |
| 01/2017 | | Yohei Hayashi | FW |  | Oita Trinita | Oita Trinita |
| 01/2017 | | Sota Hirayama | FW |  | Vegalta Sendai | Vegalta Sendai |
| 01/2017 | | Muriqui | FW |  | Vasco da Gama - RJ | Vasco da Gama |