Output in South Korea rose by 3.3% in January from December, while Japan reported a rise of 2%.
The jump in Japan’s numbers was led by auto and electronics makers as they continue to recover from disruptions caused by floods in Thailand.
The data also allayed fears that demand from eurozone, a key market for Asian goods, may be hurt by the debt crisis.
“I think the pressure (from the euro zone) is easing,” said Hwang Na-Young of Taurus Investment & Securities.
“The crisis in Europe looks like it has passed the critical point and the effects, although they have yet to reach the real economy, have been taking less of a toll on stock markets.”
Analysts said that carmakers have been ramping up their production during their recovery from those shocks, which is helping boost the overall factory output.
“Car makers are now fully recovered from the earthquake damage and they are now in production override, trying to make up for the lost output in 2011,” said Takuji Okubo of Societe Generale