The 225-issue Nikkei Stock Average added 422.50 points, or 2.14 percent, from Tuesday to close the day at 20,193.69.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, gained 14.88 points, or 1.03 percent, at 1,464.03.
Mining, securities house, and iron and steel-linked issues comprised those that advanced the most by the close of play.
Markets here were closed on Wednesday for a national holiday.
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