Donald Trump's insistence that "spoiled" Japan imports more US rice is adding to Prime Minister Shigeru Ishiba's problems ahead of elections that could sink his premiership after less than a year in office.

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%.

Donald Trump has shared the letters he sent to 14 countries including Japan detailing the levies they face and people have spotted 'appalling' errors.

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 nations that would go into effect on Aug. 1. Trump provided notice by posting letters on Truth Social that were addressed to the leaders of the various countries.

Trump shared screenshots of letters detailing new tariff rates for over a dozen countries, allowing room for further negotiations before the renewed deadline of Aug. 1.

He was aware about President Donald Trump’s frustration over the imbalance in US-Japan trade relations and offered to boost Japan’s cumulative investment in the United States to $1 trillion. It was more than a symbolic move as Japan is already the biggest foreign investor in the US,

South Korea, the United States and Japan will hold trilateral ministerial talks on the sidelines of a multilateral gathering in Malaysia on Friday, Seoul officials said, with steep U.S. tariffs, and other shared regional and global issues likely to be high on the agenda.

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President Trump's newly announced 25% tariffs on goods from South Korea and Japan closely reflect tariffs for each nation that Trump had announced on April 2, before implementing a 90-day pause that was set to expire Wednesday.

The pause on the biggest of Trump's tariffs won't end this week, but the president continues to pledge steep new duties against major countries.