Tokyo stocks snapped a five-day winning streak Friday, as investors locked in gains after the Nikkei and Topix hit all-time highs, while caution also took hold ahead of U.S. jobs data. The 225-issue Nikkei Stock Average ended down 1.28 points from Thursday at 40,912.37. The broader Topix index finished 14.29 points, or 0.49 percent, lower at 2,884.18. On the top-tier Prime Market, decliners were led by marine transportation, transportation equipment and electric power and gas issues. The U.S. dollar fell to the upper 160 yen range in Tokyo on selling by domestic exporters for settlement purpos…