Read the text "Joint Statement by the United States and Japan" here:
Washington February 22, 2013
The two Governments confirm that should Japan participate in the TPP negotiations, all goods would be subject to negotiation, and Japan would join others in achieving a comprehensive, high-standard agreement, as described in the Outlines of the TPP Agreement announced by TPP Leaders on November 12, 2011.
Recognizing that both countries have bilateral trade sensitivities, such as certain agricultural products for Japan and certain manufactured products for the United States, the two Governments confirm that, as the final outcome will be determined during the negotiations, it is not required to make a prior commitment to unilaterally eliminate all tariffs upon joining the TPP negotiations.
The two Governments will continue their bilateral consultations with respect to Japan's possible interest in joining the TPP. While progress has been made in these consultations, more work remains to be done, including addressing outstanding concerns with respect to the automotive and insurance sectors, addressing other non-tariff measures, and completing work regarding meeting the high TPP standards.