Theater Missile Defense and Japanese Nuclear Weapons

Abstract

The development of a joint US-Japan theater missile defense system could have significant ramifications beyond the defense of Japan and of American forces in the region. A growing debate within Japan on its international security position, the spread of weapons of mass destruction, and questions about the role of the United States in the region conspire to create conditions for significant changes in Japan's conception of its security status and its long‐term political-military calculations. By upgrading Japan's strategic responsibilities, theater missile defense could inadvertently induce a reassessment of many of its national security policies, perhaps even the decision to forego nuclear weapons.