Japan's annual current account surplus is the lowest on record, government figures show, as fossil fuel bills and a sliding yen overshadow rising exports.
For fiscal 2013, the value of the goods, services and investments that left Japan exceeded those coming in by Y789.9 billion ($A8.34 billion), plunging 81.3 per cent from Y4.2 trillion the previous year.
The figure was the lowest since the finance ministry started keeping comparable data in 1985.
"Exports increased, including those bound for the United States and China. But the trade deficit expanded due to the increase of imports such as crude oil and liquefied natural gas," the ministry said in a statement.
The current account is the broadest measure of the country's trade with the rest of the world, including not only trade in goods but also services, tourism and returns on foreign investment.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Japan Inc has significant amounts of money tied up in overseas investments, and it is the repatriation of income from these that means it still runs a current account surplus.
The country saw a trade deficit of 10.86 trillion yen for the year, nearly doubling a deficit of 5.62 trillion yen seen in the previous year.
Exports rose 12.2 per cent to Y69.80 trillion, while imports jumped 19.6 per cent to Y80.67 trillion.
Japan used to boast a large trade surplus on exports of cars and other industrial products.
But the nation has recently been saddled with heavy deficits stoked by its dependence on importing fossil fuels to generate electricity, after nuclear reactors were shut down following the 2011 tsunami-sparked atomic disaster.
The yen's sharp depreciation since late 2012 has also pushed up import costs.
For example, crude oil prices soared 16.6 per cent in yen-denominated terms on year, but in dollar terms, it fell 3.4 per cent, the ministry said.
The financial value of crude oil imports to Japan rose 18.4 per cent while the actual volume of imported oil only went up by 1.5 per cent, the ministry said.
For the single month of March, Japan's current account surplus came to Y116.4 billion, shrinking 90.9 per cent from Y1.28 trillion seen in the previous year.
