In 2018, research was underway in Northeast Asia on several trilateral and multilateral initiatives for cross-border infrastructure connectivity involving China, Russia, both Koreas, and Japan. Infrastructure included railway lines, cross-border oil and gas pipelines, and power grids. Although most discussions of infrastructure group energy and railroad infrastructure together, energy infrastructure differs from rail transport due to a greater potential for asymmetrical dependence. Reviewing these projects, this chapter analyzes and compares the strategies of the five parties in the region that are exploring new connectivity.