| 1998 Japan Open Tennis Championships | |
|---|---|
| Date | 13–19 April |
| Edition | 25th |
| Surface | Hard / outdoor |
| Location | Tokyo, Japan |
| Venue | Ariake Coliseum |
| Champions | |
| Men's singles | |
 Andrei Pavel[1][2] | |
| Women's singles | |
 Ai Sugiyama[3] | |
| Men's doubles | |
 Sébastien Lareau / Daniel Nestor[1][4] | |
| Women's doubles | |
| Naoko Kijimuta / Nana Miyagi[3] | |
The 1998 Japan Open Tennis Championships was a tennis tournament played on outdoor hard courts at the Ariake Coliseum in Tokyo in Japan that was part of the International Series Gold of the 1998 ATP Tour and of Tier III of the 1998 WTA Tour. The tournament was held from April 13 through April 19, 1998. Andrei Pavel and Ai Sugiyama won the singles titles.
- ^ a b "1998 Tokyo Outdoor". International Tennis Federation (ITF). Archived from the original on 17 March 2016. Retrieved 15 December 2014.
- ^ "1998 Tokyo – Men's singles draw". Association of Tennis Professionals (ATP).
- ^ a b "1998 Tokyo". International Tennis Federation (ITF). Archived from the original on 17 March 2016. Retrieved 15 December 2014.
- ^ "1998 Tokyo – Men's doubles draw". Association of Tennis Professionals (ATP).