Tokyo stocks fell Wednesday morning, as a stronger yen weighed on exporters, while bargain-hunting after five days of consecutive falls on the Nikkei index limited declines. The 225-issue Nikkei Stock Average dropped 85.55 points, or 0.22 percent, from Tuesday to 39,508.84. The broader Topix index was down 10.48 points, or 0.37 percent, at 2,822.91. The U.S. dollar weakened to the lower 155 yen range, as the yen was bought after recent calls by some senior Japanese ruling party lawmakers to normalize Japan’s monetary policy raised speculation that the Bank of Japan could lift its benchmark int…