The 225-issue Nikkei Stock Average gained 257.11 points, or 1.12 percent, from Friday to close the day at 23,139.76.
The broader Topix index of all First Section issues on the Tokyo Stock Exchange added 13.31 points, or 0.83 percent, to finish at 1,618.18.
Wholesale, mining and air transportation issues comprised those that gained the most by the close of play.
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