Japan and Ballistic Missile Defense

Book excerpt: Spurred by a perceived growing ballistic missile threat from within the Asia-Pacific region and requests from the United States to support research and development on components of a missile defense system, the Japanese government decided in late 1998 and early 1999 to move forward with joint research and development with the United States on ballistic missile defense (BMD). But the decisions taken thus far commit Japan only to limited participation with the U.S. government on collaborative research and prototype production of theater missile defense (TMD) components. To date, Japan has undertaken no effort to develop or acquire a dedicated BMD system, nor has it assessed the larger political and strategic implications of a Japanese BMD system in any thorough or systematic manner. More important, no consensus has yet emerged in favor of the development or deployment of a full-fledged BMD system in Japan. Finally, Japan and the United States have not clarified: (1) how essential it is for Japan to participate in a more extensive program of joint research and development; (2) the extent of system interoperability that is desirable and achievable; or (3) the impact of a decision to deploy on the strategic environment in Asia.