The Japanese social gaming scene is dominated by three platforms: Mixi, Mobage-town and Gree. The great majority of people access these social networks via a mobile phone instead of a computer browser. It’s a big market: according to David ‘dc’ Collier of Japanese social game developer Pikkle, it’s just as big as the U.S. market: half the population, but twice the ARPU (David gave an excellent int