The agreement that Japan secured has added pressure on South Korea to defuse the threat of high tariffs on its exports to the United States.

South Korea and the United States have been discussing a shipbuilding tie-up that could include investments to modernise U.S. shipyards and more help to repair the U.S. naval fleet as Seoul seeks better tariff terms,

South Korea, facing 25% tariffs, is rushing to reach a trade deal with Washington, with National Security Adviser Wi Sung-lac visiting the U.S. recently for high-level talks and Minister for Trade Yeo Han-koo also in the U.S. for negotiations, as pressure grows on officials to clinch a deal that is no worse than Japan's that cut tariffs to 15%.