Senators are demanding Japan open up its auto market and be granted no special exemptions if it is to be admitted into a regional trade pact championed by the Obama administration.
Lawmakers pressed a top U.S. negotiator Tuesday on how long-standing trade disagreements would be tackled following Prime Minister Shinzo Abe decision to seek Japan's entry into the Trans-Pacific Partnership, or TPP.
Democrat Sen. Debbie Stabenow complained Japan exports 120 automobiles to the U.S. for every American vehicle sold to Japan. She also said an undervalued yen is giving Japan an unfair advantage.
Republican Orrin Hatch warned the administration against allowing Japan special treatment for its heavily subsidized agriculture sector.
Acting Trade Representative Demetrios Marantis said Japan would have to put "all goods on the table" for negotiation at TPP.