Tokyo stocks finished lower Monday as exporters pared part of their earlier losses, helped by the U.S. dollar’s rally against the yen after its steep drop in the foreign exchange market. The 225-issue Nikkei Stock Average ended down 254.05 points, or 0.66 percent, from Friday at 38,110.22. The broader Topix index finished 23.31 points, or 0.87 percent, lower at 2,661.41. On the top-tier Prime Market, decliners were led by transportation equipment, bank and rubber product issues. The U.S. dollar briefly dropped below 143.50, its lowest level in three weeks, after Federal Reserve Chair Jerome Po…