United States capitalised on a poor start by Japan in the first clash today at the Harbin University of Commerce.

The sport's traditional powerhouse scored 21 unanswered points before Japan managed a field goal to open their account.

Wet conditions made play harder but the US continued to push ahead for a 42-3 victory.

Two-time reigning champion Mexico proved even more dominant in the other game today against hosts Chiba.

They scored three touchdowns in the first 10 minutes and led 56-0 by the halfway point.

Despite slowing down thereafter, they still won by the colossal margin of 70-0.

Harbin is hosting the third edition of the World University American Football Championship.

South Korea are the one other team in the round-robin format.

Action is due to resume on Thursday (June 21) after a rest day tomorrow.