Nintendo's first "game" (or rather social app) Miitomo is launching on March 17th, the company announced on Twitter yesterday.
Miitomo is planned to be a social hub to talk and exchange with your friends. It utilizes Nintendo's new account system. Nintendo's second app, planned for later this year should be a game that will feature one of Nintendo's well known IP.
If Miitomo is launching this month in Japan, you should expect a worldwide launch pretty soon. We'll keep you informed when that happens.