Based on workshops co-organized by Japan's St. Andrew University and Taiwan's National Chengchi University, this book provides readers with the toolbox for navigating the regional dynamics of political economy in Southeast Asia, with special focus on exploring the key factors determining the shifting dynamics. Organized in three parts namely geopolitical and security factors, alternative fields for regional cooperation, and the regional considerations of Southeast Asia, the chapters in the book feature key factors determining the political economy of the region. Written by authors hailing from varied background, this book is also the joint research efforts on policy discussion and timely assessment of COVID-19 recovery plans in Southeast Asia.