Drawing on cutting-edge research from leading scholars, this book investigates state preferences for regime creation and assesses state capacity for executing these preferences in Northeast Asia's energy domain, defined as the geographical area comprising the following countries - Russia, Mongolia, China, Japan, South Korea and North Korea. Specifically, the book examines questions pertaining to how states perceive the need and necessity for establishing a regime when it comes to the issue of energy and how much commitment they make to the effort in Northeast Asia. The book analyses the factors that shapes each country's fundamental energy interests in the region, how these interests impact their attitudes toward engaging the region on energy security and the way they carry out their regional engagement a different levels - government, industry, and the so-called "epistemic community" level. Based on their interests in promoting institutionalized regional energy cooperation and their capacity for forging that cooperation, the collection looks at how we assess each state's role in contributing to an energy regime in Northeast Asia. Furthermore, the book examines the implications of the Northeast Asian states' perceptions, interests, objectives, and capacity regarding regional energy security cooperation for the prospect of regime creation in the region's energy domain. This study should be of interest to scholars and students of environmental policy, energy policy, security studies, Asian studies and international relations.