Nintendo Co. said Wednesday its group net profit fell 60.6 percent in the 2015 business year ended last month to ¥16.51 billion ($139.5 million), bruised by the yen's appreciation against major currencies and languid portable game sales.

With nearly three-quarters of the video game maker's sales coming from overseas markets, the strong yen saw the company take an ¥18.36 billion hit in foreign exchange losses, denting its net profit figure.

The video game maker's operating profit grew 32.7 percent to ¥32.88 billion on sales of ¥504.46 billion, down 8.2 percent.

In addition to the currency woes, sales of software for the Nintendo 3DS portable console shrank as the company failed to follow up on fiscal 2014's major hit games.

In the year ended March 31, hardware sales of the 3DS totaled 6.79 million units, down from 8.73 million units the previous year, while sales of the Wii U console came to 3.26 million units, down from 3.38 million units.

For the current business year through next March, Nintendo expects its group net profit to more than double to ¥35 billion and its operating profit to rise 36.9 percent to ¥45 billion, on a slight decline in sales to ¥500 billion.

Nintendo also said Wednesday it will launch the "NX," a new game console currently under development, in domestic and overseas markets next March.