A trade group representing U.S. automakers urged the Trump administration to hold off further opening the American market to Japanese cars until Tokyo shows it is committed to returning the favor.

"We recommend the administration avoid making any concessions that would further open the U.S. market to Japanese imports unless and until there is evidence that Japan is truly committed to opening its auto market to U.S. vehicles," said Matt Blunt, president of the American Automotive Policy Council, which represents General Motors, Ford and Fiat Chrysler.

Blunt commented at a hearing Monday in Washington held by the U.S. Trade Representative's Office on its plans to work out a trade deal with Japan.