Happy Elements is a leading Asian game developer across platforms, its mostly famous as the largest developer on Tencent platform with almost 10M DAU, and the largest Asian developer on facebook. On the other hand, happy elements KK (the Japanese branch) is among the top 10 money makers in Japan. Merc storia is the latest game published by HEKK, got featured by google right after launch and made 3M USD in 3weeks, we would like to share some of the experience in developing and publishing this game. Intended audience & prerequisites: Developers who are interested in Japan, Taiwan and China. Session takeaway: The landscape of Asian gaming market, both SNS and mobile, especially Japan, Taiwan and China. difference of the tastes of users across countries, skills and tech operating games in these areas.