The Nikkei average gained 144.11 points, 0.56 percent, to 10,088.66, breaking the 10,000-point mark for the first time since mid-June.
Down most of the day, the Dow Jones industrial average closed 15.27 points higher, up 0.17 percent, ending at 9,108.51. The S&P 500 gained 0.3 percent, 2.92 points, to 982.18. The Nasdaq composite rose 0.1 percent, 1.93 points, to 1,967.89.
On the New York Stock Exchange, 1,939 stocks advanced and 1,061 declined on a volume of 4.6 billion shares traded.
The benchmark 10-year Treasury fell 16/32 to yield 3.721 percent.
The euro rose to $1.4237, compared to Friday's $1.4215. The dollar rose to 95.17 yen, compared to Friday's 94.77 yen.
In London, the FTSE 100 index gained 9.52, 0.21 percent, to 4,586.13.
Copyright 2009 by United Press International.