The 225-issue Nikkei Stock Average increased 638.22 points, or 2.50 percent, from Friday at 26,165.59, its highest finish since May 10, 1991.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, rose 35.01 points, or 2.03 percent, to finish at 1,762.40. Japanese financial markets were closed on Monday for a national holiday.
Securities house, precision instrument and iron and steel issues comprised those that gained the most by the close of play.
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