2008 AIG Japan Open Tennis Championships – Men's Singles
was the defending champion, but lost in the quarterfinals to Juan Martín del Potro.
Ninth-seeded Tomáš Berdych won in the final 6–1, 6–4, against Juan Martín del Potro.Seeds
All seeds received a bye into the second round.Draw
Finals
Section 2
Section 3
Section 4