Trade chiefs of Japan and the United States continued to seek progress Thursday in protracted negotiations over tariff exceptions to a Pacific free trade pact.

Akira Amari, Japan's minister in charge of the Trans-Pacific Partnership initiative, and Michael Froman, U.S. trade representative, discussed a full range of sticking points following their meeting Wednesday evening.

The ministerial talks were held in last-minute efforts to make headway prior to U.S. President Barack Obama's arrival in Japan on April 23.