"The overall export trend has been subdued since the financial crisis," said Derrick Kam, from Morgan Stanley's Asia-ex Japan economics team.
"First quarter export growth in Asia was particularly weak, down 1.8 percent year-on-year compared with a 6.1 percent rise in the fourth quarter of 2013 and a 4.1 percent gain in the third quarter," he added.
Kam said the recent weakness was mostly driven by weaker export growth to the U.S., the world's largest economy, and slower intra-regional trade.
Analysts say that some signs of a recovery in Asian exports emerged in April – for instance China's exports grew for the first time in two months. But they add that data in coming months such as export numbers from South Korea need to be watched carefully.
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Asia includes many economies still heavily dependent on exports for their growth such as China, South Korea and Taiwan. Exports from the Asian manufacturing hub are viewed by many economists as a bellwether of the global economy.
Glen Levine, a senior economist at Moody's Analytics in Sydney, said Asia's export-focused economies remain vulnerable to a change in global conditions, especially if the U.S. stumbles.
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"The outlook for the U.S. and Europe is a concern for Asia's export‐facing economies," he said in a note published Wednesday.
"Europe's economy disappointed in the opening quarter and its prospects remain perpetually bleak. The U.S. also underperformed, partly because of weather but also because of a housing slowdown that could become more permanent. If so, it would weigh on U.S. consumption demand and in turn on Asian production," he added.