Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2018 |  | Rikiya Motegi | DF |  | Montedio Yamagata | Montedio Yamagata |
| 07/2018 |  | Fabrício | FW |  | Portimonense SC | Portimonense SC |
| 06/2018 | | Nobuki Iketaka | DF | |||
| 06/2018 | | Daiki Shirato | DF | |||
| 04/2018 | | Oswaldo de Oliveira | MA | |||
| 04/2018 | | Tsuyoshi Ōtsuki | MA | |||
| 03/2018 |  | Andrew Nabbout | FW |  | Newcastle United Jets | Newcastle Jets |
| 01/2018 | | Shota Saito | MF |  | Mito HollyHock | Mito HollyHock |
| 01/2018 |  | Quenten Martinus | FW |  | Yokohama F. Marinos | Marinos |
| 01/2018 | | Takuya Iwanami | DF |  | Vissel Kobe | Vissel Kobe |
| 01/2018 | | Takuya Ogiwara | DF | |||
| 01/2018 | | Kei Oshiro | DF | |||
| 01/2018 | | Kai Shibato | MF | |||
| 01/2018 | | Naoki Yamada | MF |  | Shonan Bellmare | Shonan Bellmare |
| 01/2018 | | Kosuke Taketomi | FW |  | Kashiwa Reysol | Kashiwa Reysol |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2018 | | Wataru Endō | DF |  | Sint-Truidense VV | STVV |
| 02/2018 | | Haruki Izawa | MF |  | Tokushima Vortis | Tokushima Vortis |
| 01/2018 | | Daisuke Nasu | DF | | Vissel Kobe | Vissel Kobe |
| 01/2018 | | Yoshiaki Komai | MF |  | Hokkaido Consadole Sapporo | Consadole |
| 01/2018 | | Toshiyuki Takagi | MF |  | Cerezo Osaka | Cerezo |
| 01/2018 | | Yu Tamura | MF |  | Avispa Fukuoka | Avispa |
| 01/2018 | | Tsukasa Umesaki | MF | | Shonan Bellmare | Shonan Bellmare |
| 01/2018 | | Shinya Yajima | MF |  | Gamba Osaka | Gamba |
| 01/2018 | | Ado Onaiwu | FW |  | Renofa Yamaguchi | Renofa Yamaguchi |