Japan has announced a bigger-than-expected trade deficit for May, hit by soaring energy costs and weakening demand from struggling Europe, official data shows.
The figures, which show a Y907.3 billion ($A11.30 billion) shortfall from a year earlier, revealed that Japan had its first monthly trade deficit with the European Union since records started in 1979.
Demand from the continent, a major market for Japanese products, continues to suffer with Tokyo repeatedly warning that the eurozone debt crisis was the biggest risk for Japan's economy, the world's third largest.
Tokyo's trade deficit with the EU came to Y11.1 billion yen, reversing a year-earlier surplus of Y25.6 billion as exports of microchips and other electronic parts tumbled.
There was, however, contrasting news in the form of exports overall, rising 10 per cent to Y5.23 trillion as shipments of cars and car parts soared, mainly driven by demand in the United States.
"Europe's debt problem is affecting international trade," said Daiwa Institute of Research economist Satoshi Osanai, noting Europe-bound exports from the United States and China were also slowing.
"If the European situation worsens, trade figures would worsen further. We have to watch the European problem closely."
Japan's overall May trade deficit was a record for the month and 5.4 per cent higher than the Y860.7 billion deficit in May 2011.
It was also well above the Y520 billion deficit expected by economists.
Overall, imports jumped 9.3 per cent to Y6.14 trillion from a year earlier, largely due to rising purchases of foreign oil and gas.
Japan is struggling to meet its energy needs after its nuclear reactors were switched off after last year's atomic crisis at the Fukushima Daiichi plant.
Imports rose in volume as well as in value, as power companies stepped up fuel purchases to prepare for heavy summer demand.
"The bigger-than-expected deficit increases uncertainty", Osanai said.
"(But) considering it was a seasonal surge, we may not have to be overly pessimistic" about the fate of Japan's economy.
Mizuho Research and Consulting senior economist Norio Miyagawa said Japan's trade balance "is likely to remain in a deficit at least for the rest of this fiscal year", which ends in March 2013.
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