The protectionist trade policy of President Donald Trump's administration is of increasing concern for Japan, and it seems the U.S. government might be seriously considering raising tariffs on imported vehicles and parts.

Automakers and industry experts say that the auto levies, if implemented, would surely hit Japan's signature industry hard, with thousands of dollars of additional costs for every single imported car expected to land on manufacturers' shoulders.

Makers are in fear of being left to deal with possible losses of tens of billions of yen, without any leverage in order to defend themselves.