Building Mutual Reassurance on the Korean Peninsula: Coordinating Japan, ROK, and US Approaches to North Korea’s Nuclear Challenge

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This report addresses the denuclearization of North Korea which remains an indispensable objective not only for Japan but for the entire international community. Complete denuclearization has become a long-term goal rather than an immediately achievable outcome. The international community must simultaneously prevent North Korea from further expanding its nuclear arsenal and ensure that these weapons are never used. This dual approach—pursuing denuclearization while managing immediate nuclear risks—requires careful coordination among Japan, the Republic of Korea (ROK), and the United States.