Dr. Lee obtained his Ph.D degree from Keio University, majoring in political science. His main research area is Japanese Security Policy and International Relations in East Asia. He was a Post-doc fellow at BK21 Research Project for Department of Political Science & International Studies of Yonsei University from 2012 to 2013; a lecturer at Seoul National University, Yonsei University, Duksung Womens University, and Korea Military Academy from 2012 to 2015; a research fellow at Yonsei Institute for North Korean Studies from 2013 to 2014; research fellow at Institute of Japanese Studies of Kookmin University from 2014 to 2015; a research director at Korean Association of Contemporary Japanese Studies in 2016.