The primary actors involved are U.S. Defense Secretary Pete Hegseth and Japanese Defense Minister Shinjiro Koizumi. The initiative is supported by the U.S. House of Representatives Select Committee on China and involves the defense industrial sectors of both the United States and Japan.

The United States and Japan have agreed to establish a facility in Japan for the final assembly and testing of Advanced Medium-Range Air-to-Air Missiles (AMRAAMs). This project, known as 'Operation Supercharge,' is designed to address critical shortages in missile inventories and enhance the interoperability of F-35 fighter jets operated by both nations. The agreement also includes discussions on expanding the production of SM-3 Block IIA interceptors, which are vital for ballistic missile defense.

The agreement was finalized in Cebu, Philippines, on the sidelines of the 20th Association of Southeast Asian Nations (ASEAN) Defence Ministers' Meeting. The production facility itself will be located within Japan.

The agreement was announced on October 29, 2026, following meetings held on October 28, 2026. The initiative is part of an ongoing effort to strengthen defense cooperation in the Indo-Pacific region.

The primary motivation is to address growing concerns over China's assertiveness in the Indo-Pacific and to ensure that both nations maintain a credible deterrent. The U.S. is currently facing pressure on its missile inventories due to ongoing military operations elsewhere, and there is a recognized need to bolster the industrial capacity of the U.S.-Japan alliance to maintain a free and open international order.

The facility will operate through a joint defense production initiative. By establishing a final assembly and inspection plant in Japan, the two nations aim to streamline the supply chain for essential munitions. This process involves the transfer of technical expertise and the integration of industrial standards to ensure that missiles produced in Japan meet the same rigorous specifications as those manufactured in the United States.

This development represents a significant deepening of the U.S.-Japan security alliance. By moving toward joint production, the two nations are moving beyond simple procurement to a more integrated defense industrial partnership, which is essential for maintaining military readiness in a contested region.

The two governments will likely move to identify specific sites for the facility and finalize the technical and financial agreements required to begin construction. Observers will be watching for further details on the production timeline and the potential inclusion of other missile systems in the 'Operation Supercharge' framework.

Key Unknowns

Specific details regarding the total cost, the exact location of the facility, the number of missiles to be produced annually, and the specific division of labor between U.S. and Japanese contractors remain undisclosed.

Watch for official announcements regarding the groundbreaking of the facility and any further statements from the U.S. House Select Committee on China regarding the expansion of this initiative to other defense technologies.