Tokyo shares on Wednesday rebounded sharply on a weaker yen and buoyant overnight performance in the U. S. market. The 225-issue Nikkei Stock Average surged 386.33 points, or 2. 50 percent, from Friday to end at 15,808.73. The index plunged over 3 percent in the previous trading day. The broader Topix index of all First Section issues on the Tokyo Stock Exchange was up 25.44 points, or 2.0 percent, higher at 1,294.52. All of the 33 sector gained, led by insurance, real estate and warehousing. The turnover was about 2,426.5 billion yen (about 23.25 billion U.S. dollars).