The number of developmentally disabled students has been increasing, so a lot of institutions of higher education are confronted with problems the students have. The purpose of this study is to show how Kosen should deal with the problems. In the beginning, we will consider what a developmental disability is and who is a developmentally disabled student. And I will show what kinds of efforts to solve the problems have been implemented. Finally, I will present a unique set of challenges for Kosen to improve the situation of the students.