The 225-issue Nikkei Stock Average added 307.00 points, or 1.32 percent, from Friday to close at 23,511.62.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, gained 27.70 points, or 1.69 percent, to finish at at 1,661.93.
Pulp and paper, iron and steel, and real estate-linked issues comprised those that gained the most by the close of play.
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