This book brings together a series of expert analyses to unravel the multifaceted challenges and opportunities within the energy sectors of ASEAN and East Asian countries. Distinct in its approach, this volume presents a fusion of in-depth theoretical analysis and current research, allowing readers to explore various facets of energy transitions. Contributions from leading experts on the energy implications of the Russia-Ukraine War, provide a rich, academically rigorous exploration of the subject. Designed for policymakers, researchers, academics, and professionals in the energy sector, the book maintains an advanced content level that is both intellectually stimulating and practically relevant. It is also an invaluable resource for students in higher education pursuing studies in energy policy, environmental economics, and regional studies. This book is a crucial reference for anyone seeking to deeply understand the theoretical underpinnings and future directions of energy transitions in ASEAN and East Asia.