In this paper I use a transborder lens to investigate the region encompassed by the Russian Far East, northeast China, eastern Mongolia, northern Korea, and the Sea of Japan. We need to transcend the framework of nation-states and restore the region's historical agency in a broader geographic, geopolitical, and economic context. We also need to view the socioeconomic development of the area in terms of a protracted process in which various indigenous groups played crucial roles. Recognizing the historical dynamic of this region helps to reconceptualize its present and future development.