Japanese mobile social gaming company DeNA reported improved sales for the quarter to 31 March, driven by its international expansion.

The company racked up sales of US$529 million, 32 percent up on the same period a year ago. Operating income was US$234 million, an increase of 19 percent over 2011.

For the fiscal year to 31 March, DeNA enjoyed record sales of US$1.82 billion – up 29 percent – and operating income of US$794 million, an increase of 13 percent.

DeNA CEO Isao Moriyasu said the company has had “an eventful and fruitful” year, during which it has invested in talent, technology and partnerships – including deals with China’s three biggest mobile operators and Disney – as it strives to become “the world’s leading social gaming platform.”

The company’s Mobage social gaming platform is now available all over the world with the introduction of Mobage China and Mobage Global in July 2011 and Daum Mobage in South Korea in February 2012.

The company’s Moba-coin cross-game currency has seen US$640 million of transactions while Mobage social card battle game Rage of Bahamut recently topped the Google Play top-grossing apps chart in the US.

DeNA’s director of global corporate development Takashi Doi, recently talked to Mobile Apps Briefing about the company’s strategy and the challenges that lie ahead.