"Japanese Manga as Culture" is one of "Co-learning classes in multi-cultural environment" of Hokkaido University. Foreign students and Japanese students who are interested in the Japanese Manga study together using Japanese language. Foreign Students must achieve tasks such as discussion and writing papers in this class. The class is intended to develop understanding and awareness about culture not to learn Japanese language. But it is predicted that the foreign students can learn Japanese language from the point of view of intrinsic motivation theory. This study aims to discuss what foreign students learn in this class.