Guys:
What I should have asked was, did they use U.S. trucks on the main island of Japan during ww2.

Whiterook, Ur question is a little confusing. By "they" do you mean the Japanese? Also, no US ground forces set foot on the Home Islands until after the war was over.

They may have used U S vehicles during the war. Before they became the Enemy the US was trading all sorts of commodities with them. I do know that they had the 45 cubic inch Harley's there. They were manufactured by the Japanese under license form Harley. There were also civilian trucks and cars already there. So I guess you could say they used US trucks on the main land Japan during the war. I don't think there was any captured military vehicles on the main land though. Any thoughts from our Japanese Modeling Friends out there?