This report is part of a comprehensive long-term project undertaken by HRNK to use satellite imagery to shed light on human suffering in North Korea by monitoring activity at prison facilities throughout the nation. This study details activity observed during the past 15 years at a prison facility identified by escapees and researchers as “Kyo-hwa-so No. 4, Kangdong” (39.008838° 126.153277°) and endeavors to establish a preliminary baseline report of the facility.