Hamilton, the leading money winner on the Japanese tour this season, won 3-and-2 over 36 holes at the Nidom Classic course in Hokkaido.
In the third-place match, Japan's Tetsuji Hiratsuka defeated compatriot Hirofumi Miyase 1-up after 22 holes.
Hamilton earned $250,000 for his fourth victory on this season's Japanese tour. The players in the field were selected on the basis of money rankings.
Copyright 2003 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.