TOKYO, Feb 27 Japanese government bond prices rose on Monday, with the five-year yield hitting a three-month low, on relief over the Bank of Japan’s bond buying and caution on U.S. President Donald Trump’s speech later in the week. TOKYO, Feb 27 The dollar slipped to a more than two-week low against the yen on Monday, as investors awaited this week’s speech by U.S. President Donald Trump for clues on tax reform.