The security and economic environment surrounding Okinawa is becoming more uncertain and worrisome. In response, the Okinawa Prefectural Government recently launched its Subnational Diplomacy initiative to promote cooperation and prevent conflict in East Asia. Governor Denny Tamaki of Okinawa will discuss the basic thinking behind this Subnational Diplomacy, some of the concrete steps taken thus far, and the prospects for the future. Then a panel of prominent experts on Japan, international relations, and security policy will comment on Governor Tamaki’s remarks and assess the opportunities and constraints that Okinawa faces to develop and exert its influence in shaping the regional environment.