Abstract
Japan’s vital interests, both its energy security and US alliance, are at stake in the Middle East. Change in Japan’s Middle East policy is charted over three periods, from a stance independent of the United States to one increasingly aligned with US policy. This is explained in terms of four variables: level of US hegemony, threats in East Asia, energy vulnerabilities in the Middle East, and normative change inside Japan. Japan’s policy in Middle East/North Africa reflects its general move toward a more militarily enhanced version of mercantile realism.