What happens to foreign-owned companies based in the United States during war-time?

Question

I work for the Ohio-based Honda auto plant. If the U.S. unexpectedly went to war with Japan what would be the immediate actions of our government concerning such a large and complicated company as Honda?

Answer 1

The company's assets in the U.S would most probably be seized and its finances frozen.  

Answer 2

Probably it would not be different when Pearl Harbor was bombed by the Japanese.