Ariake Coliseum
The 1989 Suntory 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 1989 Nabisco Grand Prix and of Category 2 of the 1989 WTA Tour. The tournament was held from April 17 through April 23, 1989. Stefan Edberg and Kumiko Okamoto won the singles titles.