Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 10/1998 |  | Seok-Ju Ha | FW |  | Cerezo Osaka | Cerezo |
| 09/1998 |  | Harumi Kori | MA | |||
| 09/1998 | | Kentaro Hayashi | MF |  | Tokyo Verdy | Verdy |
| 07/1998 |  | Tomàs | DF |  | CD Toledo | CD Toledo |
| 02/1998 | | Benito Floro | MA | |||
| 01/1998 | | Nobuhiro Maeda | GK | | Tokyo Verdy | Verdy |
| 01/1998 | | Ryuji Kubota | DF |  | Yokohama F. Marinos | Marinos |
| 01/1998 | | Naoto Matsuo | DF | |||
| 01/1998 | | Kazuyoshi Mikami | DF | |||
| 01/1998 | | Megumu Yoshida | DF | | Tokyo Verdy | Verdy |
| 01/1998 | | Yuta Abe | MF |  | Sanfrecce Hiroshima | Sanfrecce |
| 01/1998 | | Shigetoshi Hasebe | MF |  | Kawasaki Frontale | Frontale |
| 01/1998 | | Takanori Nunobe | MF |  | Júbilo Iwata | Júbilo Iwata |
| 01/1998 | | Yusuke Sato | MF |  | Nagoya Grampus | Nagoya Grampus |
| 01/1998 | | Do-hoon Kim | FW |  | Jeonbuk FC | Jeonbuk |
| 01/1998 | | Masato Tachibana | FW | |||
| 01/1998 | | Mitsutoshi Watada | FW |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 06/1998 |  | Matthew Bingley | DF |  | JEF United Chiba | JEF United |
| 02/1998 |  | Stuart Baxter | MA |  | AIK | AIK |
| 01/1998 | | Naoki Mori | DF |  | RB Omiya Ardija | RB Omiya Ardija |
| 01/1998 | | Ippei Watanabe | DF |  | Mito HollyHock | Mito HollyHock |
| 01/1998 | | Toshihiro Yoshimura | DF |  | Oita Trinita | Oita Trinita |
| 01/1998 |  | Gerry Peyton | GK-CO | | AIK | AIK |