1990 Tokyo Indoor – Singles

Aaron Krickstein was the defending champion, but lost in the second round this year.

Ivan Lendl won the title, defeating Boris Becker in the final, 4–6, 6–3, 7–6(7–5).

Seeds
• # 🇸🇪 Stefan Edberg (semifinals)

• # 🇩🇪 Boris Becker (final)

• # Ivan Lendl (champion)

• # 🇪🇨 Andrés Gómez (second round)

• # 🇺🇸 Aaron Krickstein (second round)

• # 🇫🇷 Guy Forget (third round)

• # 🇺🇸 Michael Chang (second round)

• # 🇦🇺 Richard Fromberg (second round)

• # Jakob Hlasek (quarterfinals)

• # Andrei Cherkasov (quarterfinals)

• # 🇺🇸 Richey Reneberg (semifinals)

• # 🇺🇸 David Wheaton (third round)

• # 🇦🇺 Wally Masur (third round)

• # 🇩🇪 Carl-Uwe Steeb (second round)

• # 🇺🇸 Tim Mayotte (second round)

• # 🇦🇺 Darren Cahill (third round)