2008 AIG Japan Open Tennis Championships – Men's Singles

David Ferrer 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.

2008 AIG Japan Open Tennis Championships – Men's Singles

David Ferrer 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.