This report analyses and compares the low carbon city policies and practices of China, Japan, and the Republic of Korea, with the goal of identifying sector-specific and city-specific good practices that may be instructive to researchers and policymakers in the wider NEA region. It examines key national-level carbon mitigation policies and sector-specific actions, reviews both top-down and bottom-up low carbon city policy-design and implementation mechanisms and describes fifteen case studies on greenhouse gas (GHG) emission reductions with specific insights. This report will be used in NEA-LCCP information-sharing activities and to promote regional cooperation on low carbon development and climate action.