1989 Suntory Japan Open Tennis Championships – Men's singles
Introduction John McEnroe was the defending champion but lost in the semifinals to Stefan Edberg.Edberg won in the final 6–3, 2–6, 6–4 against Ivan Lendl.
Seeds The top eight seeds received a bye to the second round.
Draw ===Finals======Top half=======Section 1========Section 2=======Bottom half=======Section 3========Section 4====
External links *  1989 Suntory Japan Open Tennis Championships draw