The nation's current account surplus grew more than fivefold to ¥7.81 trillion in fiscal 2014, marking the first increase in four years as a downturn in crude oil prices pushed down imports and a weaker yen boosted the country's overseas income, government data showed Wednesday.

The surplus in the current account balance, one of the widest gauges of international trade, expanded by ¥6.34 trillion from the previous year, the Finance Ministry said in a preliminary report.

Among key components, goods trade registered a deficit of ¥6.57 trillion, as exports increased 8.4 percent to ¥75.61 trillion on the back of overseas economic recovery and the yen's depreciation, and imports rose 1.8 percent to ¥82.18 trillion.