Lleyton Hewitt was the defending champion but lost in the quarterfinals to Paradorn Srichaphan.
Kenneth Carlsen won in the final 7–6(8–6), 6–3 against Magnus Norman.
Seeds The top eight seeds received a bye to the second round.
Lleyton Hewitt (quarterfinals) Juan Carlos Ferrero (second round) Carlos Moyá (second round) Àlex Corretja (second round) Juan Ignacio Chela (third round) James Blake (second round) Nicolás Lapentti (second round) Paradorn Srichaphan (semifinals) Stefan Koubek (first round) Jan-Michael Gambill (first round) Dominik Hrbatý (second round) Agustín Calleri (second round) Wayne Arthurs (second round) Nicolás Massú (third round) David Ferrer (first round) Taylor Dent (third round)
Draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
References 2002 AIG Japan Open Tennis Championships Draw 2002 AIG Japan Open Tennis Championships Qualifying Draw