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Japanese bargaining behavior and U.S.‐Japan relationship: FSX co‐development project

The whole process, from the initial conception of the FSX project for independent development by Japan to the conclusion of the contract for co‐development, is a rich source for political and theoretical implications on the relationship between Japan and the United States. First, the U.S. and Japan each had different conceptions about their roles in the security treaty, most notably, in the area of burden sharing. Second, the U.S. domestic debate illustrates the changing concept of security and various perceptions of its relative decline. Third, this case provides a single test bed for multiple theories of two‐level games, bureaucratic politics model and rational choice approach. Lastly, the FSX project also provides a fertile case in testing two theoretical perspectives of the realist and the institutionalist to explain international cooperation.