This report examines policy changes that have driven actual and proposed shifts in the alliance between the U.S. and Japan. Key features of the proposals include a reduction in the number of U.S. Marines in Japan, the relocation of a controversial Marine air base in Okinawa, expanded cooperation in training and intelligence sharing, and command structure changes. The report concludes with a number of potential options for U.S. policymakers to protect U.S. security interests in the Asia Pacific. Those options include further bolstering Japan’s military, reducing the U.S military presence in the region, encouraging Japan to focus on international peacekeeping and reconstruction operations, developing trilateral defense cooperation, and creating a security forum in northeast Asia.

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