Yabuki Susumu, in a series of articles and talks, has rigorously mined the historical record of China (PRC/ROC)-Japan-US relations to illuminate the background to the dangerous conflict that presently threatens to bring war to the Western Pacific in the wake of Japanese nationalization of three of the Senkaku islands in September 2012. While other important issues add to the gravity of the conflict, including enlarged territorial claims by China, Japan and Korea in the form of advancing and defending competing claims to ADIZ in the East China and South China Seas, Yabuki shows the long trajectory of competing claims over the Senkaku dispute and the evolving policies of China, Japan and the United States in shaping it. Since so much of the international discussion of the issues has focused on China-Japan conflict, a particularly important contribution of the present paper is its clear presentation of US recognition at the highest levels of the significance of the competing territorial claims, and its maneuvering in negotiations with Taipei, Tokyo, and Beijing to shape the outcome.