Asian stocks were higher in quiet post-Christmas trade Wednesday, with Tokyo shares lifted by a weaker yen which sank to a 20-month low against the greenback.
The Nikkei 225 index at the Tokyo Stock Exchange jumped 1.49 percent, or 150.24 points, to 10,230.36 as the Japanese currency dipped past 85.00 yen against the dollar for the first time since April 2011.
A strong yen is negative for Japanese markets as it erodes exporters' revenue and makes their products less competitive overseas.
Seoul closed flat, adding 0.43 points to 1,982.25, while Shanghai gained 0.25 percent, or 5.52 points, to 2,219.13.12.
Markets in Hong Kong, Sydney and Wellington were closed for a public holiday.
Regional gains came despite a lack of fresh trading cues as US and European markets were shut for Christmas, with pessimism still lingering about prospects for a "fiscal cliff" deal by the end of the year.
US lawmakers are set to return to the negotiating table after Christmas holidays in a last-ditch effort to reach a deal to avert the so-called cliff, a series of steep tax hikes and spending cuts due to take effect in January.
Experts warn that going over the cliff could plunge the world's biggest economy back into recession.
But despite those concerns, the dollar improved on Wednesday against the yen, hitting a 20-month high on expectations that the Bank of Japan would initiate more monetary easing steps.
The unit has been declining as the new Japanese premier Shinzo Abe, whose Liberal Democratic Party won a landslide election victory last week, steps up pressure on the central bank to take bold easing steps.
Abe was named prime minister on Wednesday, after he swept to power on a hawkish platform of getting tough on diplomacy while fixing the economy with active fiscal spending and monetary easing.
"The yen is firmly on a weakening path and there is no meaningful rebound in sight at the moment," Daisuke Uno, strategist at Sumitomo Mitsui Banking, told Dow Jones Newswires.
However, the policy easing is "almost completely factored in now as the new government takes the reins. By (end-March 2013) the 86-87 mark is likely but the fall will be at a decelerated pace than what we've seen to this point", he said.
In Asian trade the greenback was at 85.25 yen in the afternoon from 84.78 yen in Tokyo late Tuesday, while the euro bought 112.420 yen compared with 111.75 yen.
Oil prices were higher, with New York's main contract, light sweet crude for delivery in February, rising 39 cents to $89.00 a barrel. Brent North Sea crude for February gained 50 cents to $109.30.
Gold was at $1,658.10 at 1045 GMT compared with $1,655.80 late Monday.
In other markets:
-- Taipei ended flat, slipping 2.38 points to 7,634.19.
HTC fell 1.06 percent to Tw$279.5 while TSMC was 0.52 percent lower at Tw$96.0.
-- Manila gained 0.15 percent, or 8.89 points, to 5,832.83.
Metropolitan Bank and Trust rose 1.18 percent to 102.90 pesos and SM Prime Holdings added 1.69 percent to 16.80 pesos.
-- Singapore closed up 0.39 percent, or 12.24 points, to 3,180.81.
Keppel Corp gained 0.83 percent to Sg$10.93 while Singapore Airlines shed 0.36 percent to Sg$10.96.
-- Kuala Lumpur rose 0.13 percent, or 2.18 points, to 1,671.58.
Malayan Banking added 0.3 percent to 9.10 ringgit while CIMB lost 0.5 percent to 7.60 ringgit.
-- Jakarta gained 0.59 percent, or 24.88 points, to 4,275.09.
Cement maker Indocement Tunggal Prakarsa rose 2.47 percent to 22,850 rupiah while carmaker Astra International fell 1.33 percent to 7,400 rupiah.
-- Bangkok added 0.28 percent, or 3.91 points, to 1,382.23.
Oil company PTT lost 0.60 percent to 331.00 baht while Siam Cement dropped 0.45 percent to 438.00 baht.
-- Mumbai gained 0.84 percent, or 162.37 points, to 19,417.46.
India's top mobile phone company Bharti Airtel rose 2.78 percent to 317.45 rupees while ICICI bank rose 2.38 percent to 1,147.95 rupees.