President Donald Trump on Monday set a 25% tax on goods imported from Japan and South Korea, as well as new tariff rates on a dozen other countries.

Japan and South Korea, the United States’ closest security allies in Asia and key partners in its effort to counter China, were sent scrambling Tuesday after the U.S. president renewed his threat to impose steep tariffs on their goods,

While South Korean imports to the U.S. face 25% tariffs, the same as Trump promised in April, the rate on Japan has been raised by 1 percentage point to 25%.