Feb 12,2016 National Commentaries A South Korean Perspective "US-ROK-Japanese Trilateral Security Cooperation" Despite the practical necessity of trilateral security cooperation among the United States, the Republic of Korea (ROK), and Japan, conditioned by changes in the security environment in and around the Korean Peninsula, the Park administration has maintained a kind of lukewarm or cautious attitude toward it. Several factors have contributed […] Choi Kang* comfort women , Regional commons , Regionalism , unification