A FINANCIAL Times article, titled “US military deepens ties with Japan and Philippines to prepare for China threat,” depicts the current defense and military configurations of the United States-Japan-Philippines security, defense and military alignment, which is unfolding and is more apparent these days.
The article’s central argument is that the US was already moving from ordinary alliance cooperation toward active “theater-setting” in the Western Pacific, especially with Japan and the Philippines, in preparation for a possible conflict with China, particularly over Taiwan.
Quoted in the article was Lt. Gen. James Bierman, then-commanding general of Marine Forces Japan/III Marine Expeditionary Force. The most striking phrase attributed to Bierman is that the US was “setting the theater” in Japan, the Philippines and other locations, meaning it was not merely reacting to China’s rise but preparing military infrastructure, access, interoperability, logistics and allied coordination ahead of any contingency.
The broader point is that Japan is becoming a frontline operational partner, not just a host of US bases, while the Philippines is being framed as part of the emerging US strategic architecture in the First Island Chain. In plain terms, the Philippines is not treated merely as a treaty ally, but as a geographically crucial access point for logistics, mobility, dispersal and possible operations in a Taiwan and/or South China Sea (SCS) crisis.
This exposes the strategic logic behind the current developments in the US-Japan-Philippines defense and security alignment, such as expanded Enhanced Defense Cooperation Agreement (EDCA) sites (US military bases in the Philippines), more frequent joint military exercises, rotational US presence and the growing linkage among the Philippines, Japan, Taiwan and US Indo-Pacific planning.
However, insofar as the Philippines is concerned, it raises a sharper question: Is the Philippines strengthening its defense posture, or being fitted into someone else’s war map? It seems that the US and Japan are already preparing the chessboard before many Filipinos have even fully debated the game.
US-Japan-PH alignment
As of June 2026, the US-Japan-Philippines alignment is best understood as a networked security triangle, not yet a formal three-way military alliance. The US has separate treaty alliances with Japan and the Philippines, while Japan and the Philippines have rapidly deepened defense ties through new access, logistics, maritime and intelligence-sharing agreements. In simpler terms, Washington is the hub, and Tokyo and Manila are no longer just separate spokes; they are now being connected to each other.
The legal foundation is not just one treaty, but interlocking agreements. The Philippines and the US remain bound by the 1951 Mutual Defense Treaty. The US and Japan are bound by the 1960 US-Japan Security Treaty. Japan and the Philippines do not have a mutual defense treaty though. But they now have the Reciprocal Access Agreement (RAA), which entered into force on Sept. 11, 2025. It enables smoother entry and operations of the Japanese Self-Defense Forces in the Philippines and of the Armed Forces of the Philippines (AFP) in Japan for joint exercises, disaster relief and other cooperative activities.
The Japan-Philippines RAA is complemented by the Acquisition and Cross-Servicing Agreement (ACSA), signed on Jan. 15, 2026, which creates a framework for reciprocal provision of supplies and services between the Japan Self-Defense Forces and the AFP. This is crucial because modern military cooperation is not only about ships and aircraft. It is about fuel, ammunition, food, maintenance, transportation, communications and sustainment.
In plain language, the RAA opens the door; the ACSA helps keep forces operating once they are through the door. Japan and the Philippines also said in May 2026 that they would begin talks on a classified information-sharing agreement to allow Japan to step up transfers of military equipment to Manila, including possible warships and patrol aircraft.
Perhaps, there is no NATO-style “Article 5” among all three. But operationally, they are moving toward a quasi-alliance structure, and the modern trilateral framework was formally elevated during the first US-Japan-Philippines leaders’ summit in Washington on April 11, 2024. The joint vision statement committed the three countries to advance defense cooperation through combined naval training, exercises and coordination of US and Japanese support for Philippine defense modernization. That summit was important because it transformed what had been separate bilateral ties into a more deliberate trilateral strategic architecture.
The strategic geography
In all these, why does the Philippines matter so much? The Philippines sits at the junction of three strategic theaters, including the SCS, which is important to the US freedom-of-navigation strategy. The Luzon Strait/Bashi Channel, a critical passage between the SCS and the Western Pacific, is highly relevant to any Taiwan contingency. The First Island Chain, which includes the Philippines, Japan, Taiwan and nearby island arcs, forms a geographic barrier affecting Chinese naval and air access to the Pacific.
All these make the Philippines critically important and central to US and Japanese military planning. This is not only about defending Philippine maritime rights; it is also about the Philippines’ location within the broader US-Japan strategic posture toward China.
But what does each country bring to the triangle? For the US, its treaty commitments under the Mutual Defense Treaty, EDCA access, advanced military systems, intelligence, surveillance, logistics, command-and-control and Indo-Pacific operational reach. For Japan, maritime capacity, coast guard cooperation, defense technology, possible arms transfers, logistics support, funding assistance and strategic weight as a US treaty ally. And for the Philippines, geography, access points, proximity to Taiwan and the SCS, its claimed legal victory under the 2016 arbitral ruling and a frontline maritime presence.
Given this, the uncomfortable truth is that the Philippines contributes the most valuable asset: location. Geography is power, but it can also become a trap if not managed with strategic prudence, autonomy and clarity. Thus, the strategic reality is clearer: the Philippines is being integrated into a broader US-Japan security, defense and military architecture designed to operate across the SCS, the Luzon Strait, Taiwan-adjacent waters and the First Island Chain military posturing vis-à-vis China.
Conclusion
For the Philippines, this brings both benefits and risks. It can strengthen Philippine maritime domain awareness, improve the country’s military modernization, increase interoperability and enhance its perceived deterrence against China, especially in the disputed waters of the SCS. However, it may also deepen the Philippines’ exposure to a conflict not of its own making, especially in the event of a Taiwan contingency. The more Philippine territory becomes useful for allied military operational planning, the more the country risks being seen not merely as a claimant defending its maritime rights and claims in the SCS, but as a forward node in a larger US-Japan-led China-containment strategy.
Thus, for the Philippines, the essential question is not whether cooperation with the US and Japan is useful. It is in many respects. The real question is whether the Philippines can use this military and defense cooperation to strengthen its defense and security posture, and maritime rights and claims in the SCS without allowing the country to become a convenient chessboard for a great-power confrontation, and whether we are strengthening our own house or merely renting out the front yard for someone else’s fire?
Source: The Manila Times
https://www.manilatimes.net/2026/06/06/opinion/columns/theater-setting-or-trap-setting-in-the-pacific-the-us-japan-ph-defense-and-military-alignment/2359562
