He spoke to troops at a base in Japan at the start of his marathon Asian tour.
US President Donald Trump said no nation should underestimate American resolve, as he arrived in Japan at the start of a marathon Asian tour.
Addressing US troops at Yokota air base near Tokyo, he pledged to ensure the military had the resources needed to keep peace and defend freedom.
He later told the Japanese prime minister he thought the two countries had never been closer.
It will be the longest tour of Asia by a US president in 25 years.
It comes amid heightened tensions with North Korea over its nuclear programme and missile tests.
„No-one, no dictator, no regime… should underestimate American resolve,“ President Trump told cheering US and Japanese troops shortly after his arrival in Japan.
Before touching down, he told reporters on board Air Force One that he expected to meet Russian President Vladimir Putin during his trip.
„I think it’s expected we’ll meet with Putin,“ he said. „We want Putin’s help on North Korea.“
Speaking after talks with Prime Minister Shinzo Abe, Mr Trump said: „The relationship is really extraordinary.
„We like each other and our countries like each other, and I don’t think we’ve ever been closer to Japan than we are right now.
