Since 2006, Keio University has opened its annual summer school program at University of Washington to students from other APRU member universities.
Focused on "Human Systems in the Pacific Northwest Bioregion", the program is an intensive three-week course on environmentology designed to introduce students from a wide range of academic and professional interests to issues and challenges encountered in an urbanizing area with plentiful natural resources. The program offers up to 5 slots to students from other APRU universities.