The concept of the shared house is “Language exchange”. A foreigner who want to study Japanese and a Japanese who wants to learn English lives in this shared house and they build a language community. If you are Japanese, you are a teacher to teach Japanese and a student to study English. On the other hand, if you are a foreigner, you are a teacher to teach English and a student to learn Japanese. A new community, “Language exchange”, is built beyond relationship between a teacher and a student. You can acquire English naturally through many events such as a cooking event, a party and a sightseeing event with a foreigner.