DeNA, a Japan-based mobile company with a presence in California, is continuing to ramp up its involvement in the American mobile and social gaming industry. The company is announcing its acquisition today of Gameview, an iPhone developer with several social titles (also known as Bayview Labs).

Gameview is an interesting target for DeNA, which has already shown interest in mobile social gaming through its investment in Aurora Feint. We recently reviewed several Gameview games, finding them to be close analogues to Facebook farming and pet titles.

That’s still an unusual strategy on mobile, where casual and puzzle games rule the roost (think Angry Birds).

But DeNA has a wider focus than most companies. Its parent company, DeNA Global, claims it will make $1 billion in revenue this year from its activities across Japan, including its ownership of the mobile social network Mobage Town.

Facebook doesn’t have much of a presence in Japan, and much of the social networking done in the country is through mobile networks. The success of Mobage in that environment has likely given DeNA more confidence than American developers have that social gaming will work on mobile devices.

We wrote about DeNA’s plan to invest $27.5 million in American social gaming companies in June. The company also recently announced a partnership with Namco Bandai, placing that developer’s titles on Mobage Town.