The Koshihara Memorial Hall was built in 2009 for permanent preservation of the footsteps of the founder and the history of the school. The Hall was 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 Hall has two functions. First, the exhibition area provides space for permanent and special exhibitions of historical materials such as the history of the school, education, and folk customs. It is also used for work presentations by students and graduates. Second, the hall on the second floor is used for lectures, plays, and concerts.