Twelve Pacific Rim countries wrapped up the 19th round of the Trans-Pacific Partnership talks in Brunei on Friday, saying they made progress on tariffs and other key issues while agreeing to hold more working-level talks in the coming weeks.

During the nine-day round since Aug. 22, Japan proposed eliminating tariffs on around 80 percent of imported products, and plans to raise the offer to over 90 percent in subsequent negotiations, sources said.

Their chief negotiators will meet in Washington from Sept. 18 to 21, a negotiation source said, adding that the Brunei round was the last for full-blown negotiations, as the countries will now likely focus on "intersessional" meetings that involve only one or two working groups.