The Koshihara Memorial Hall was built in 2009 to preserve the footsteps of the founder and the history of the school forever. The Hall opened as a place for teachers, students, and graduates to present the results of their constant efforts and also to serve as a facility for extensive cultural exchange.
　The functions of the Hall can be divided into three categories. First, it is a storehouse that preserves historical materials regarding the history of this school, education, folk customs, etc. Second, it is an exhibition room which provides space for permanent and feature exhibitions. This exhibition room is also used for student and graduate presentations. Third, there is a hall for lectures, plays, and concerts.