The 1990 Suntory Japan Open Tennis Championships was a combined men's and women's tennis tournament played on outdoor hard courts at the Ariake Coliseum in Tokyo, Japan that was part of the Championship Series of the 1990 ATP Tour and of Tier IV category of the 1990 WTA Tour. It was the 16th edition of the tournament and was held from 9 April through 15 April 1990. Second-seeded Stefan Edberg and first-seeded Catarina Lindqvist won the singles titles.
Stefan Edberg defeated Aaron Krickstein 6âÂÂ4, 7âÂÂ5
Catarina Lindqvist defeated Elizabeth Smylie 6âÂÂ3, 6âÂÂ2
Mark Kratzmann / Wally Masur defeated Kent Kinnear / Brad Pearce 3âÂÂ6, 6âÂÂ3, 6âÂÂ4
Kathy Jordan / Elizabeth Smylie defeated Hu Na / Michelle Jaggard 6âÂÂ0, 3âÂÂ6, 6âÂÂ1