James L. Schoff, Douglas E. Rake, Joshua Levy
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Changing Perceptions of Extended Deterrence in Japan
The U.S. nuclear umbrella is only one component of America’s security commitment to Japan. Forward defense deployments, cooperative missile defense development, stepped-up intelligence sharing, and diplomatic and political visits are all components of extended deterrence.
Source: Strategy in the Second Nuclear Age

The chapter looks beyond just the nuclear component of extended deterrence with regard to Japan. Indeed, U.S. reassurance of its nuclear umbrella over Japan is only one (albeit important) component of America’s security commitment to Japan. U.S. forward deployments in East Asia, missile defense development with Japan, stepped-up intelligence sharing with Japan, U.S. preemptive strike policies vis-à-vis North Korean missile launch pads, and diplomatic/political visits and signaling are all components of extended deterrence, among others.
A detailed understanding of how Japan can and might approach the nuclear question in response to current and future events is critical for the proper orientation of America’s security policies in East Asia and for a well-functioning U.S.-Japan alliance.
Strategy in the Second Nuclear Age is available for purchase through the Georgetown University Press.
About the Author
Former Senior Fellow, Asia Program
James L. Schoff was a senior fellow in the Carnegie Asia Program. His research focuses on U.S.-Japan relations and regional engagement, Japanese technology innovation, and regional trade and security dynamics.
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James L. Schoff
Recent Work
Carnegie does not take institutional positions on public policy issues; the views represented herein are those of the author(s) and do not necessarily reflect the views of Carnegie, its staff, or its trustees.
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