Japan and the United States ended their first round of talks under the World Trade Organization dispute-settlement panel Wednesday, with neither side making concessions in their dispute over Japan's exports of hot-rolled steel to the U.S., trade sources said.

The meeting, held at the WTO headquarters in Geneva, centered on a claim filed by Japan to the world trade body last November.

Japan claims that the U.S. antidumping duty -- as high as 67.14 percent of the import value -- on its steel products is based on a miscalculation and violates WTO antidumping rules.

The U.S. has denied this claim, saying its tariff rates are accurately calculated and are in line with WTO rules.

The three-member WTO dispute-settlement panel is scheduled to meet again Sept. 27.

The panel is expected to present a final report on the case by the beginning of next year, the sources said.