Abstract
We developed an Online BARNNGA, which is social simulation game, to observe human's social skills of leaning to implicit understanding. This game based on BARNGA which purpose is experience to explore factors related to communication problems in intercultural situations with cards game (trick taking game). In BARNGA, differences of a game's rule represent cultural difference. Likewise, implicit understanding can represent likely differences of a game's rule. Then we observe behavior of players on the game and analyze social skills.