SINGAPORE (Reuters) -- The yen languished near a four-month low against the U.S. dollar and a 16-year trough against the euro on Wednesday, a day after the Bank of Japan's widely anticipated decision to end its negative interest rate policy.While the Bank of Japan ushered in the country's first rate hike in 17 years, the central bank said it expected to maintain accommodative conditions for the time being, keeping pressure on the yen as U.S.-Japanese rate differentials remain stark.On Wednesday, the yen weakened to a four-month low of 151.34 per...