Defense Ministers from Australia Japan Philippines and United States Strengthen Indo-Pacific Partnership
May 31, 2025 — Singapore — Defense leaders from Australia, Japan, the Philippines, and the United States convened their fourth ministerial meeting in three years to reaffirm their commitment to a free and open Indo-Pacific amid growing regional security challenges.
Australian Deputy Prime Minister and Minister for Defence Richard Marles, Japanese Minister of Defense Nakatani Gen, Philippine Secretary of National Defense Gilberto Teodoro Jr., and U.S. Secretary of Defense Pete Hegseth gathered on the sidelines of the 22nd International Institute for Strategic Studies Asia Security Summit to discuss enhanced cooperation in response to destabilizing actions in the East and South China Seas.
Expressing serious concern over China’s aggressive maneuvers and unilateral attempts to alter the status quo by force or coercion, the leaders underscored the necessity of upholding international law, including the United Nations Convention on the Law of the Sea, freedom of navigation, and peaceful dispute resolution. They emphasized ASEAN’s critical role in maintaining regional security and stability.
The meeting resulted in four key announcements that mark significant advances in their partnership:
Synchronizing Defense Investments: The countries reaffirmed their commitment to aligning defense infrastructure investments supporting Philippine defense priorities. This includes Japan’s installation of air surveillance radar at Wallace Air Station, the U.S.’s development of air domain sensors at Basa Air Base, and Australia’s contributions to strengthening Philippine defense infrastructure. These efforts enhance the Armed Forces of the Philippines’ air domain awareness in the South China Sea.
Enhancing Information-Sharing: The leaders welcomed the recent U.S.-Philippines General Security of Military Information Agreement (GSOMIA) and noted Australia and Japan’s intent to pursue similar arrangements with the Philippines. These initiatives aim to foster a unified operating picture and facilitate collaborative intelligence sharing.
Strengthening Cybersecurity and Resilience: The defense ministers agreed on joint investments to bolster the Philippines’ cybersecurity capabilities and resilience, leveraging existing exercises and training programs. They stressed the importance of countering malicious cyber threats to national security.
Increasing Operational Coordination and Interoperability: The four countries committed to expanding maritime cooperative activities, with a focus on enhancing deterrence and security in the East and South China Seas. They agreed to explore joint intelligence, surveillance, and reconnaissance operations to improve interoperability and operational coordination.
The defense leaders emphasized the importance of ongoing ministerial and official-level meetings to sustain momentum and strengthen trilateral cooperation with other like-minded partners. Together, they pledged continued collaboration to uphold peace, stability, and prosperity across the Indo-Pacific region.
This latest meeting reinforces a shared vision of collective security, underscoring the strategic alignment of Australia, Japan, the Philippines, and the United States in the face of evolving regional challenges.
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