Japan began talks with the United States to find out the details of U.S. President Donald Trump’s planned reciprocal tariff measures, as the Asian nation braces for potential fallout.

Trade minister Yoji Muto and Chief Cabinet Secretary Yoshimasa Hayashi told reporters Friday that Tokyo began communicating with Washington over the matter, after Trump ordered his administration to consider imposing reciprocal tariffs on numerous trading partners.

Trump has singled out Japan and South Korea as nations that he believes are taking advantage of the U.S., according to a White House official. In the past, Trump has attacked Japan’s trade surplus with the United States and yen weakness that feeds into that imbalance.