| 1999 Japan Open Tennis Championships | |
|---|---|
| Date | 12–18 April |
| Edition | 26th |
| Category | Championship Series Tier III |
| Surface | Hard / Outdoor |
| Location | Tokyo, Japan |
| Venue | Ariake Coliseum |
| Champions | |
| Men's singles | |
 Nicolas Kiefer[1][2] | |
| Women's singles | |
 Amy Frazier[3] | |
| Men's doubles | |
Jeff Tarango /  Daniel Vacek[1][4] | |
| Women's doubles | |
| Corina Morariu / Kimberly Po[3] | |
The 1999 Japan Open Tennis Championships was a tennis tournament played on outdoor hard courts at the Ariake Coliseum in Tokyo, Japan that was part of the International Series Gold of the 1999 ATP Tour and of Tier III of the 1999 WTA Tour. The tournament was held from April 12 through April 18, 1999. Nicolas Kiefer and Amy Frazier won the singles titles.
- ^ a b "Men's - 1999 Tokyo Outdoor". International Tennis Federation. Archived from the original on 18 January 2015. Retrieved 18 January 2015.
- ^ "1999 Tokyo Men's Singles draw". www.atpworldtour.com. Association of Tennis Professionals (ATP).
- ^ a b "Women's - 1999 Tokyo". International Tennis Federation. Archived from the original on 4 March 2016. Retrieved 18 January 2015.
- ^ "1999 Tokyo Men's Doubles draw". www.atpworldtour.com. Association of Tennis Professionals (ATP).