The 225-issue Nikkei Stock Average rose 13.44 points, or 0.05 percent, from Tuesday at 26,800.98, its highest close since April 17, 1991.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, ended 5.59 points, or 0.32 percent, higher at 1,773.97.
Rubber product, nonferrous metal and marine transportation issues comprised those that gained the most by the close of play.
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