Members of the committee raised several other issues that have yet to be resolved, including how to deal with state-owned enterprises involved in commercial activities, currency manipulation, and U.S. efforts to extend patent protections for pharmaceutical companies without depriving poorer countries of cheaper generic drugs. The negotiations have also met opposition from environmental groups and others who cite a lack of transparency in revealing the contents of the talks.
"You've got a heavy, heavy load there," said Rep. Mike Kelly, a Pennsylvania Republican. "I don't know how you are going to get it done as quickly as you want to get it done."
Much of the skepticism touched on whether Japan is serious about lowering barriers that have long made many of its markets closed to American goods and services. "In the TPP, I have serious concerns about Japanese non-tariff barriers in the auto, insurance and agriculture sectors," said committee chairman Dave Camp, a Michigan Republican.
"While there are many outstanding issues, Japan's engagement presents a broader policy question: whether and how to address one-way trade, a very unlevel playing field," added the top Democrat on the panel, Rep. Sander Levin of Michigan.
In 2010, the United States exported about 14,000 vehicles to Japan, while importing some 1.5 million vehicles.
Froman stressed that there were no upfront exclusions of individual Japanese sectors when the United States in April agreed to Japan's entry into the negotiations. He said U.S. negotiators will be meeting with their Japanese counterparts at the end of the Malaysia round to "bring them up to speed" on the accord.
Japanese Prime Minister Shinzo Abe has said that he is prepared to expose the country's sheltered industries to more foreign competition, but he faces strong resistance from many in his own party.
Froman also pledged that the administration will work with Congress to craft a new trade promotion authority bill that would give the administration the power to negotiate trade deals that Congress can accept or reject but cannot alter. The last trade promotion authority act expired in 2007, making negotiating partners less willing to proceed with trade deals because of concerns that Congress will tamper with them.
Republicans have pushed for renewal of trade promotion authority, but some Democrats, who see trade agreements as a source of environmental damage and labor rights violations, have resisted.
Froman said that it was important to have the authority in place before the TPP is sent to Congress, noting that there had only been one free trade agreement in history, with Jordan, considered without the authority in place.
Levin said a new trade promotion authority bill must give Congress a "significant, sustained role" in establishing trade principles. "Today, trade agreements address a broad and growing range of policy areas, so members of Congress must play an active role in their development," he said.