Tokyo's Nikkei climbed 0.8 percent to near 7-1/2-year highs, with sentiment buoyed by media projections suggesting a strong win for Japanese premier Shinzo Abe's coalition at the Dec. 14 election. A victory for Abe could lead to a new mandate for his "Abenomics" policies to revive the economy.
"There's activity in anticipation of extremely promising conditions being born," said Hiroyuki Nakai, chief strategist at Tokai Tokyo Research Center Co in Tokyo.
MSCI's broadest index of Asia-Pacific shares outside Japan .MIAPJ0000PUS rose 0.4 percent, while Australian shares .AXJO were up 0.9 percent.
The Shanghai Composite Index .SSECsurged 2.3 percent as the rally on expectations that China would implement further stimulus measures showed no signs of abating.
Private payrolls and services sector data released on Wednesday underscored the U.S. economy's resilience.
That contrasted with the gloom in the euro zone, with a survey showing business activity grew less than expected in November and raised the specter of another economic contraction.
The euro struggled as a result. It fetched $1.2307 EUR= after falling to a two-year low of $1.2301 overnight on the view that the ECB will be forced to inject even more stimulus to prop up the tottering euro zone economy.
While a full-blown quantitative easing program after Thursday's policy review is seen as unlikely, some believe the ECB may lay the groundwork for such a move early next year.
"The prospect of a sovereign bond buying program is looking ever more likely. It probably won't begin tonight (however, we see further corporate bond buying tonight)," Evan Lucas, market strategist at IG in Melbourne, wrote in a note to clients.
"The prospect will only increase sentiment towards European equities."
Spreadbetters forecast a higher start for European stocks, with Britain's FTSE .FTSE and Germany's DAX .GDAXI seen opening 0.2 percent higher and France's CAX .FCHI rising 0.1 percent.
Speculation that the ECB will pave the way on Thursday for sovereign debt purchases has pushed down euro zone debt yields across the board. The Italian 10-year yield IT10YT=TWEB fell to a record low below 2 percent overnight.
The dollar rose to a new seven-year high of 119.955 yen JPY= after the upbeat U.S. data further highlighted the diverging monetary policy paths of the United States and Japan.
Crude oil markets remained choppy after last Thursday's decision by OPEC not to cut supply sparked volatility and a sharp price fall.
U.S. crude futures CLc1 rose 67 cents to $68.05 a barrel after gaining the previous day on data showing a surprise tumble in U.S. inventories. U.S. crude has lost more than 30 percent so far this year, touching a seven-year low of $63.72 on Monday. [O/R]
Gold's advance was halted as the dollar's strength pared the metal's allure as an alternative investment. Spot gold XAU= dipped 0.3 percent to $1,205.40 an ounce after gaining 0.9 percent the previous day on firmer oil prices.
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