1989 Suntory Japan Open Tennis Championships – Women's singles
Introduction Patty Fendick was the defending champion but did not compete that year.Kumiko Okamoto won in the final 6–4, 6–2 against Elizabeth Smylie.
Seeds A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.#  Anne Minter ''(semifinals)''#  Belinda Cordwell ''(semifinals)''#  Ann Henricksson ''(second round)''#  Sandra Wasserman ''(quarterfinals)''#  Etsuko Inoue ''(quarterfinals)''#  Betsy Nagelsen ''(quarterfinals)''#  Monique Javer ''(second round)''#  Louise Allen ''(first round)''
Draw
External links *  1989 Suntory Japan Open Tennis Championships Draw