By Leika Kihara
TOKYO (Reuters) - Factory activity in many Asia economies weakened in March but there were some brighter signs in China and South Korea, surveys and data showed on Monday, offering a mixed picture on the once fast-expanding, key driver of the global economy.
China's Caixin/S&P Global manufacturing purchasing managers' index (PMI) rose to 51.1 in March from 50.9 the previous month, a private survey showed on Monday, expanding at the fastest pace in 13 months with business confidence hitting an 11-month high.
The finding joins an official PMI survey released on Sunday that showed China's factory activity expanded for the first time in six months.
The rebound in China, which is struggling to mount a strong economic revival partly due to a protracted property crisis, provides some welcome relief to Beijing and investors globally.
Separate data showed South Korea's exports rose 3.1% in March year-on-year, marking the sixth straight month of increase thanks to robust demand for chips.
And over in Japan, while big manufacturers' sentiment soured, optimism among services sector firms hit a more than three-decade high in the first quarter, the central bank's tankan survey showed.
But manufacturing activity was weak in most parts of Asia including export powerhouses Japan and South Korea, as well as Taiwan, Malaysia and Vietnam.
Japan's final au Jibun Bank PMI stood at 48.2 in March, the highest level since November and recovering from February's 47.2 which marked the fastest pace of contraction in over 3-1/2 years.
However, activity contracted for a 10th straight month as new export orders slumped, reflecting souring sentiment in key markets like China and North America, the survey showed.
South Korea's manufacturing activity also weakened in March as slowing domestic demand offset robust overseas sales with the PMI falling to 49.8 in March from 50.7 in February.
The soft PMI readings highlight the challenge the region's policymakers face as they wrestle with patchy signs of recovery in global demand and uncertainty on when the U.S. Federal Reserve would start to cut interest rates.
"China's exports are picking up a bit but that's because their goods are cheap. That means other Asian countries must compete with China for demand that's not growing," said Toru Nishihama, chief emerging market economist at Dai-ichi Life Research Institute.
"With no clear driver of global growth, it's hard to paint a rosy outlook for Asia," he added.
Taiwan's PMI fell to 49.3 in March from 48.6 in February, while that for Vietnam dropped to 49.9 from 50.4, and Malaysia's declined to 48.4 from 49.5, the surveys showed.
By contrast, manufacturing activity expanded in March in the Philippines and Indonesia, the surveys showed.
In revised forecasts issued in January, the IMF projected Asia's economy to expand 4.5% this year, driven by robust U.S. demand and the boost from expected stimulus measures in China.
But it said the recovery would be divergent across economies with Japan likely to see growth slow to 0.9%, in contrast to an expected 6.5% expansion in India. The IMF expects China's economy to expand 4.6% this year, slowing from 5.2% in 2023.