This book investigates how subnational governments, specifically Hokkaido and Sakhalin, influence the long-standing territorial dispute between Japan and Russia over the South Kuril Islands. Brad Williams, an expert in international relations, examines the 'Sakhalin Factor' to argue that local political and commercial interests often diverge from or complicate the national-level diplomatic strategies of Tokyo and Moscow. By analyzing the transnational interactions between these two regions, the author provides a framework for understanding how local actors exert pressure on high-level foreign policy decisions during the Yeltsin and Putin eras.

Experts recognize this work as a specialized study that fills a gap in the literature regarding the role of regional actors in bilateral territorial disputes. Readers frequently note the academic density of the prose and the author's meticulous use of local primary sources to support his arguments.