Online game is high value-added industry. for it is not sales but services, various enterprise participants make sphere of this industry diversely and Online game make it possible to get continuous profit. In addition, there is no cultural obstacle among players in game industry, which means that the connection with other industries could create enormous economic effects. With the advent of cultural content era, Korea has early developed Online game industry. Also Japan is a leading country in the game industry, which means that Japan has more outstanding high technology and a great number of game users. Besides different from Korean, the Japanese develop leisure activities and video(Console) game equipments. But Console game, which is supported to game market in Japan, become downsizing. On the contrary to this, Online and Mobile game market is continuing to grow. So this research suggest some strategies about getting through Japan Online game market more efficiently and successfully.