Trump reveals why US is supporting Japan's yen, says 'They're good, except Pearl Harbour'

US President Donald Trump on Monday confirmed that the US Treasury is buying the Japanese yen to prop up its value after it hit a 40-year low. Asked why US is helping another country's currency, Trump said, "We've a good relationship with Japan. We're very strong financially." "Japan's been very good to us, with the exception...of Pearl Harbour," he added.