ESSAY : Japan–Philippines Maritime Security — The Quiet Alliance That Has Beijing Alarmed

Introduction: Two Archipelagos Facing a Maritime Empire

Geography as destiny

In contemporary geopolitics, certain alliances do not announce themselves with great bursts of speech, do not make CNN front pages, and yet silently reconfigure the regional order. The Tokyo–Manila axis, patiently built since 2023 on the rubble of a turbulent colonial history and a mutual mistrust inherited from World War II, is one of those. In this month of June 2026, this discreet alliance has suddenly emerged from the shadows — not because the two countries decided it should, but because Beijing cracked. China's reaction to the announcement of EEZ delimitation negotiations between Japan and the Philippines was so violent, so disproportionate, that it involuntarily revealed the extent of the threat this cooperation poses to Xi Jinping's imperial ambitions in the Western Pacific.

On May 28, 2026, Japanese Prime Minister Sanae Takaichi and Philippine President Ferdinand Marcos Jr. jointly announced they were opening formal negotiations to delimit the boundaries of their respective exclusive economic zones, which overlap in the waters east of Taiwan. A technical decision in appearance — but one that touches one of Beijing's most sensitive nerves: China's pretended sovereignty over these maritime spaces, claimed on the basis of its self-proclaimed control over Taiwan.

The cascade of Chinese reactions

Beijing's response was swift. On June 1, 2026, China launched naval patrols in the waters east of Taiwan, explicitly described by the Chinese Coast Guard as a direct response to the Japan-Philippines negotiations. On June 6, Beijing escalated further, organizing a "special maritime law enforcement operation" in those same waters. On June 9, Foreign Ministry spokesman Lin Jian stated at a press conference that the two countries had "bypassed China" to launch negotiations that "seriously violate international law, including UNCLOS." On June 16, Taiwan reported a tense standoff between its Coast Guard and Chinese vessels 33 nautical miles southeast of the island. In a matter of weeks, Beijing had transformed an ordinary diplomatic procedure into a regional crisis.

The Architecture of an Alliance, Year by Year

From historical mistrust to strategic partnership

To understand what is happening today between Japan and the Philippines, one must appreciate the distance traveled. For decades after World War II, the Philippines maintained an ambivalent relationship with its former occupying power, Japan. The scars of the Manila Massacre of 1945 have not disappeared. Security cooperation was limited, military exchanges virtually nonexistent. It was only under President Rodrigo Duterte that the Chinese threat began forcing the two countries to look in the same direction — toward structured cooperation, even if Duterte himself dangerously oscillated toward Beijing.

Under Ferdinand Marcos Jr., since 2022, the transformation has accelerated spectacularly. The Reciprocal Access Agreement (RAA) between Japan and the Philippines, which entered into force in 2025, forms the cornerstone of this transformation. This treaty — Japan's first of its kind in Asia, its third globally after Australia and the United Kingdom — allows for the deployment and temporary stationing of troops on each other's territory. It is a considerable qualitative shift in the nature of the bilateral relationship: moving from cooperation to operational interoperability.

The May 2026 turning point: defense-intelligence integration

President Marcos's official visit to Tokyo in May 2026 crossed yet another threshold. Beyond the EEZ negotiation announcement, the two countries signed a defense equipment and technology transfer agreement, formalized on May 5, 2026 at a meeting of defense ministers — Japanese Defense Minister Koizumi Shinjiro and Philippine Defense Secretary Gilberto Teodoro Jr. — in Manila. This agreement establishes a joint working group and commits both countries to cooperation across the entire defense chain: training, maintenance, operational coordination, intelligence sharing, and future equipment transfers. That same week, the two nations launched formal negotiations on a General Security of Military Information Agreement (GSOMIA), which would enable the exchange of classified data. The Japan-Philippines GSOMIA, if concluded, would complete a shared intelligence architecture that, in the Indo-Pacific, is beginning to resemble what NATO took decades to build in Europe.

The "One Theater" Concept: A Geostrategic Revolution

The South China Sea and East China Sea as a unified space

The most revolutionary concept to emerge from Japan-Philippines cooperation in 2026 is that of the "one theater" concept. In an address at the Center for Strategic and International Studies in Washington on June 4, 2026, Philippine Foreign Affairs Secretary Ma. Theresa Lazaro articulated what constitutes a genuine revolution in regional strategic thinking: "The South China Sea and the East China Sea will be considered a singular theater." This is not an empty formula. It is the recognition that China's ambitions in these two maritime spaces are not two distinct problems that can be managed separately, but one and the same expansionist strategy that both nations must counter in a coordinated manner.

This unified vision is of paramount importance for understanding why the announcement of EEZ negotiations in the waters east of Taiwan provoked such a reaction in Beijing. These waters represent the precise junction point between the two theaters: they are adjacent to the Bashi Channel, the Miyako Strait, and other strategic maritime chokepoints China seeks to control in any blockade or invasion scenario involving Taiwan. When Tokyo and Manila agree to delimit their spheres of influence in this precise space, they are drawing a strategic line Beijing cannot ignore.

Implications for the Western Pacific island chain

The intelligence architecture underpinning this single theater is equally significant. A Chinese think tank cited in June 2026 analyses sounded the alarm on precisely this point: hydrographic data and vessel movement trajectories in the South China Sea can be synchronized in real time with Japan's Self-Defense Forces, while reconnaissance intelligence and aerial surveillance data in the East China Sea can be transmitted directly to Philippine armed forces. This real-time interconnection of surveillance and intelligence systems transforms bilateral cooperation into a considerable tactical advantage, particularly in gray-zone management scenarios — those provocations below the threshold of armed conflict that China practices with growing sophistication.

The Teodoro Sanction: Beijing Strikes Back with Personal Reprisals

A first in the history of Chinese diplomatic sanctions

On June 11, 2026, Beijing sanctioned Philippine Defense Secretary Gilberto Teodoro, barring him and his family from entering China or doing business there. This gesture, diplomatic in appearance, is in reality historic: it is the first time in history that China has sanctioned a sitting minister of a nation it recognizes diplomatically. The precedent is without equivalent. Typically, these types of personal sanctions are reserved by Beijing for Taiwanese officials, Hong Kong personalities, or Western political figures. Applying them to a sitting Philippine defense secretary breaks a taboo and signals an escalation into uncharted territory.

Teodoro had multiplied firm statements about the Chinese threat. In an interview with Reuters on May 30, 2026, he had described China as a "severe territorial threat" to the Philippines. He had criticized a Chinese aid offer to the Philippines as "disingenuous." He had contested the Chinese "nine-dash line" claiming sovereignty over virtually the entire South China Sea. Faced with this, a Chinese Foreign Ministry spokesman had responded on June 2 that the Philippines should not let "a few clowns" compromise bilateral relations — before Beijing moved to formal sanctions on June 11.

The "small anti-China group" rhetoric: a mirror of Taiwan propaganda

The ISW (Institute for the Study of War) noted a troubling parallel in its June 18, 2026 analysis: the language Beijing used to attack Teodoro — "a small group of anti-China elements whose actions harm the interests of the Filipino people" — is almost word for word the vocabulary deployed against Taiwan's government, which Beijing regularly accuses of being a separatist clique betraying the interests of Taiwanese people. The goal is the same: isolate the targeted leader from his own population, present national defense positions as personal adventurism, and fragment domestic support for resistance to Chinese aggression. It is a classic cognitive warfare tactic, now applied to Philippine leaders.

Operation Xiang Yang Hong 22: Scientific Research as a Strategic Weapon

A research vessel, two coast guard escorts

From June 16 to 18, 2026, the research vessel Xiang Yang Hong 22, belonging to the East China Sea Bureau of China's Ministry of Natural Resources, conducted a "marine environment survey" in the waters east of Taiwan. On paper, a benign scientific mission assessing ecosystem health. In reality, according to vessel tracking data from Starboard Maritime Intelligence, two Chinese Coast Guard (CCG) ships escorted the Xiang Yang Hong 22 throughout the operation. This is not a scientific research vessel. It is a strategic data collection operation under environmental cover, escorted by armed vessels.

The ISW, in its June 18, 2026 analysis, was direct about the nature of the data collected: information on underwater conditions — marine chemistry, hydrometeorology — has critical applications for submarine navigation and underwater detection. The waters east of Taiwan are located in the immediate vicinity of the Bashi Channel and the Miyako Strait, two of the most strategically important passages in the Western Pacific that China would need to control in any blockade or invasion scenario involving Taiwan. The Xiang Yang Hong 22's mission is not a biodiversity survey. It is the operational preparation for a future conflict.

The progressive normalization of disguised military presence

What makes this operation particularly alarming is its place within a long-term strategy. Since June 1, 2026, China has permanently maintained at least two CCG vessels in the waters east of Taiwan. From June 6 to 10, four civil law enforcement vessels had conducted a first special operation in these same waters. The Xiang Yang Hong 22 operation from June 16 to 18 constitutes a third wave. The ISW notes that the Chinese Ministry's announcement that the survey "provides a basis for future conservation efforts" could signal that further operations will follow. This is the Chinese technique of maritime fait accompli: a presence first contested, then repeated, then normalized, then permanent.

Scarborough Shoal: The Theater of Repeated Provocations

A floating platform as a trial balloon

Commercial satellite images from May 25, 2026 revealed the presence of a square object near the southeastern entrance of Scarborough Shoal (Bajo de Masinloc in Philippine terminology). Two Chinese research vessels had been spotted in the area as early as May 21. The 6-by-6-meter floating platform, equipped with what appeared to be an antenna, was, according to Manila, a device for maritime data collection. The Philippines filed a formal diplomatic protest — several demarches and an official protest — and demanded its removal.

Beijing responded, through its embassy, that the platform was "a temporary scientific research installation" managed by the South Sea Institute Oceanology of the Chinese Academy of Sciences. A "floating in-situ sampling instrument" to study the shoal's ecosystem, according to deputy spokesman Guo Wei. Mission "completed successfully." The structure was finally removed on June 17, 2026, after nearly three weeks on station. Alexander Lopez, spokesman for the Philippine National Maritime Council, stated on June 11 that "what they are doing is collecting data and information, effectively pillaging our resources."

The memory of Panganiban Reef: the precedent haunting Manila

Philippine defenders of maritime sovereignty were quick to recall the most traumatic precedent in recent Sino-Philippine relations: in 1995, China seized Panganiban Reef (Mischief Reef) by beginning with "temporary shelters for fishermen." Those temporary shelters became a fortified military installation. Scarborough Shoal has been in Philippine waters for centuries, less than 200 nautical miles from Zambales — and more than 500 nautical miles from Hainan. An international arbitral tribunal ruled in 2016 that China's blockade of the shoal violated international law. Beijing refuses to recognize that ruling. Since 2012, CCG vessels and Chinese maritime militias have prevented Philippine fishermen from accessing these rich waters.

The PLA Carrier Strike Group East of the Philippines: The Show of Force

An aircraft carrier as a political signal

Since May 19, 2026, the People's Liberation Army Navy (PLAN) has maintained a carrier strike group deployed in the waters east of the Philippines. This positioning, documented in the ISW's June 18, 2026 analysis, is not routine. It constitutes a calculated show of presence in the Philippines' direct sphere of influence and in the immediate vicinity of the sea lanes linking Japan to its strategic partners. This carrier strike group, which had already deployed significant naval assets during the Balikatan exercises of April and May 2026 in response to Philippine-American maneuvers, materializes China's ability to project force far beyond its coasts.

Context is critical: during the Balikatan 41-26 exercises in spring 2026, Japan's Self-Defense Forces participated for the first time in ground training under the operational framework of the Reciprocal Access Agreement, concretely symbolizing the depth of Japan-Philippines-U.S. trilateral operational cooperation. The PLA's response with a carrier strike group clearly signals that Beijing is watching, measuring, and preparing counter-options. The sea east of the Philippines is no longer a quiet backyard — it is a space of active geopolitical confrontation.

The strategic significance of power projection

This naval deployment fits within a broader strategy documented by the ISW: China seeks to establish de facto control over key zones through continuous maritime presence, even before needing open conflict. Scarborough Shoal, de facto controlled by Beijing since 2012 despite the absence of any recognized legal title, is the perfect example. Second Thomas Shoal, where China tried to consolidate its position against the Philippine presence until July 2024, is another. The carrier strike group east of the Philippines represents the same logic applied at the regional scale: signaling that any escalation of Japan-Philippines cooperation will come at a cost, and that China is prepared to impose it.

The Manila Trilateral Meeting: The United States Enters the Equation

The second high-level trilateral security summit since 2024

On June 8, 2026 in Manila, Japan, the United States, and the Philippines held their second high-level trilateral meeting focused on maritime security, the first having taken place in 2024. Senior officials from foreign and defense ministries, as well as the Japan Coast Guard, participated in this meeting, which addressed the situation in the South China Sea — and Beijing's growing coercive posture in the region. The three countries reaffirmed their collective refusal of any unilateral attempt to alter the status quo by force or coercion. This standard diplomatic formula masks a concrete reality: the three nations are building a coordinated response architecture to China's strategy.

The American dimension of the equation must not be underestimated. Even amid uncertainty about the reliability of Washington's commitments under the Trump administration — uncertainties that Taiwanese President Lai Ching-te explicitly mentioned at a press conference on June 18, 2026, reported by the Mainichi Shimbun — the United States maintained its participation in these exercises and trilateral meetings. Trump had described the $14 billion arms package pledged to Taiwan as a "good negotiating tool" with Beijing in a TV interview, sowing alarm in Taipei and across the region. But institutional cooperation continues, carried by U.S. military and diplomatic bureaucracies.

A distributed and resilient security architecture

The strategic value of this trilateral architecture lies precisely in its resilience to presidential moods in Washington. By multiplying direct bilateral agreements — the Japan-Philippines RAA, the ACSA, future GSOMIA negotiations — Tokyo and Manila are building a cooperative base that would survive a partial American disengagement. The Free and Open Indo-Pacific (FOIP) concept, promoted by Japan since the Abe era, finds its most concrete and durable expression in the Japan-Philippines partnership. And multilateral military exercises — Balikatan, Maritime Cooperative Activities, four-nation formats including Australia — weave a network of trust and interoperability that no longer exists only on paper.

Taiwan in the Equation: Neither Included Nor Excluded

Taipei's delicate position facing the EEZ negotiations

Taiwan's situation in this strategic triangle is profoundly ambivalent. On one hand, Taipei welcomes any cooperation that strengthens resistance to Chinese pressure. On June 4, 2026, Taiwanese Foreign Minister Lin Chia-lung stated that the Japan-Philippines maritime boundary talks aimed to counterbalance China, and that Taipei was in close contact with both countries to protect its rights. But Taiwan also declared on June 18, through President Lai Ching-te's voice, that Chinese vessels had penetrated the exclusive economic zones of Taiwan, Japan, and the Philippines under the pretext of law enforcement, and called for collective regional defense to avoid being "divided and conquered" one by one.

On the other hand, Taiwan is officially excluded from the EEZ negotiations between Tokyo and Manila. Secretary Lazaro was explicit: "Taiwan is not part of the negotiations... It is solely between us and Japan." This positioning was necessary to avoid feeding Chinese claims that these negotiations trample on Beijing's sovereignty over Taiwan. But it creates a tension: the delimited waters touch precisely the spaces where Taiwan deploys its coast guard, where its economic claims are real, and where its security is directly at stake. The standoff on June 16, 2026, with seven Taiwanese patrol vessels deployed against four CCG ships 33 miles southeast of the island, concretely illustrates this tension.

Coordinated surveillance of Pratas Island: a first

On June 16, 2026, Taiwan's coast guard reported an unprecedented development: for the first time, a Chinese research vessel and a CCG ship had acted in coordination to provoke Taiwan in the waters surrounding Pratas Island (Dongsha) in the northern portion of the South China Sea. Taiwan controls Pratas, but Beijing claims it too — as it claims virtually the entire maritime space in question. This first documented coordination between Chinese research and coast guard vessels around Pratas represents a qualitative escalation. It suggests that the Xiang Yang Hong 22 strategy east of Taiwan is not an isolated case but the application of a systemic doctrine.

International Law as a Battlefield

UNCLOS: a double-edged weapon

One of the most interesting fault lines in this maritime conflict is the legal interpretation war around the United Nations Convention on the Law of the Sea (UNCLOS). China, which ratified UNCLOS, brandished it during the 2012 Scarborough Shoal crisis to justify its claims. Today, this same China accuses Japan and the Philippines of "seriously violating" the convention by conducting EEZ delimitation negotiations — a right explicitly provided for and governed by that same treaty. Spokesman Lin Jian, on June 9, 2026, stated that the Japan-Philippines talks "violate international law including UNCLOS and the basic norms governing international relations." It is a remarkable legal contortion.

The 2016 arbitral tribunal — a proceeding China did not participate in and whose validity it does not recognize — had already ruled clearly that Chinese claims in the South China Sea based on the "nine-dash line" had no basis in international law. This ruling, though unenforceable, remains a fundamental legal marker. It has been invoked by the Philippines in all subsequent diplomatic proceedings. It constitutes the legal foundation on which Manila and Tokyo can build their own delimitation negotiations with full legitimacy.

The question of China being "bypassed" in EEZ negotiations

Beijing claims to have been "bypassed" in the Japan-Philippines negotiations. But this claim rests on a prior assertion: that China holds sovereignty over Taiwan, and therefore over the surrounding waters, giving it a right of oversight over any negotiation in these spaces. This is a circular petitio principii. China does not exercise sovereignty over Taiwan. It claims it. And an unrecognized claim, unvalidated by a competent tribunal, cannot serve as a basis for blocking legitimate negotiations between two sovereign states. Jurists know this. Beijing knows it too. What it is interested in is not the legal argument. It is the pressure effect.

The Balikatan Exercises and Trilateral Interoperability

Military exercises that push the boundaries

The Balikatan 41-26 exercises, conducted in spring 2026, represented a decisive symbolic and operational threshold in the Japan-Philippines-U.S. relationship. For the first time, Japan's Self-Defense Forces participated in ground training directly under the operational framework of the Reciprocal Access Agreement between Tokyo and Manila. This is no longer an observational exercise or symbolic cooperation: it is concrete operational integration, with all the logistical, doctrinal, and command implications this entails. The joint statement from Japan's Ministry of Defense on May 5, 2026 underscores that this participation "symbolizes the deepening of operational cooperation between the two countries."

The PLA's response to these exercises was immediate and documented: deployment of significant naval assets in response to Balikatan, followed by the positioning of a carrier strike group east of the Philippines from May 19 onward. The chronology is eloquent. Multilateral exercises with Australia, in a four-nation format, add another layer of strategic complexity for Beijing, which must now manage an alliance architecture extending from the Sea of Japan to Australian waters through the South China Sea.

The expansion of multilateral exercises: toward an Indo-Pacific bloc

The joint defense ministers' communiqué of May 5, 2026 details the existing exercise formats and their trajectory: Japan-Philippines-U.S. formations, Australia-Japan-Philippines-U.S. formations, multilateral maritime cooperative activities (MCA), and even an expansion to ASEAN contexts. This multiplication of formats is not disordered — it reflects a deliberate strategy of weaving a collective security web that makes each node more difficult to attack in isolation. China can threaten the Philippines. It can provoke Japan. But it cannot simultaneously face a coherent coalition of Indo-Pacific democracies without exposing its own vulnerabilities.

The Political Economy of Philippine Resistance

The economic costs of standing firm against Beijing

The Philippines' resistance to Chinese pressure is not without cost. China is one of the Philippines' main trading partners, and any honest observer must acknowledge the considerable economic pressure Beijing can exert. June 2026 analyses documented the instruments available to Beijing to "strike back" against the Tokyo-Manila relationship: commercial pressure, reduction of Chinese exports to the Philippines, manipulation of tourist flows, and of course the lever of Chinese aid that Teodoro had criticized as "disingenuous." The personal sanction against Teodoro is part of this economic and political coercion strategy — by targeting an individual, Beijing hopes that future Philippine ministers will think twice before publicly criticizing Chinese maritime claims.

But the Philippine strategy of diversifying partnerships — strengthening ties with Japan, the United States, Australia, and even the strategic partnership elevated with Vietnam formalized around the same period — reveals an integrated economic and security vision. The Philippines is not seeking to trigger a trade conflict with China. It is seeking to build enough alternatives and support networks so that the price of capitulating to Chinese claims is judged greater than the price of resistance. It is a courageous political calculation in a country where economic dependencies on China are real and documented.

The logic of economic partnership with Japan

The Japan-Philippines relationship is not exclusively military. Japan is a historic economic partner of the Philippines, a major infrastructure investor, and a long-standing development aid provider. The "transformation into a comprehensive strategic partnership" that Secretary Lazaro evoked in June 2026 incorporates dimensions of infrastructure, economic connectivity, and people-to-people cooperation that reinforce the overall robustness of the relationship. When Lazaro speaks of "reliable and resilient democratic supply chains" — language close to what President Lai of Taiwan used in June 2026 to describe Japan-Taiwan technological cooperation — she articulates a vision of economic security that complements military security.

The Voice of Lai Ching-te: A Call for Democratic Solidarity

A June 18, 2026 speech that resonates across the region

On June 18, 2026, Taiwanese President Lai Ching-te held an international press conference in Taipei of considerable symbolic and strategic importance. According to the Mainichi Shimbun of June 19, Lai called on China to "abandon any plan of military action against Taiwan," declaring that the island was open to dialogue on a basis of equality and respect. He explicitly asked China to "cease military escalation in the Taiwan Strait and in the East and South China Seas." He denounced gray-zone tactics — disinformation, cognitive warfare — that do not technically constitute armed conflict but erode the resistance of democracies.

Above all, Lai articulated a call for regional democratic solidarity that perfectly captures the strategic stakes of the Japan-Philippines alliance: "do not let ourselves be divided and conquered." He expressed the desire for a partnership with Japan, the Philippines, and other Indo-Pacific nations to "promote regional peace and stability." He mentioned the Chinese vessels that had "penetrated the exclusive economic zones of Taiwan, Japan, and the Philippines under the pretext of law enforcement" — a precise description of the preceding weeks' operations. And he insisted that Taiwan was "ready to assume collective defense responsibilities alongside the world community."

The convergence of democratic narratives

What is striking about Lai's statements on June 18 is their convergence with the language and positions expressed by Tokyo, Manila, Washington, and Canberra in the preceding weeks. What is emerging is a coherent democratic narrative on Indo-Pacific security: a China that seeks to alter the status quo through coercion, democracies that choose to support each other rather than negotiate separately with Beijing, and an international legal framework — UNCLOS, arbitral decisions, UN norms — that only democracies genuinely apply. This narrative, if maintained with consistency, constitutes a first-rate strategic asset in the face of Chinese state propaganda.

Conclusion: The Sea as a Mirror of the Coming World Order

An alliance that transcends the military

What is unfolding in the South and East China Seas in this month of June 2026 goes far beyond the question of maritime boundaries between Japan and the Philippines. It is a confrontation over the very nature of the international order in the 21st century: can the rules of the law of the sea, patiently built since UNCLOS in 1982, withstand the raw power of a revisionist great power that rejects them when they constrain it? Can mid-sized democracies, by intelligently coalescing, exercise credible deterrence against a military superpower that bets on their fragmentation? The Tokyo-Manila axis, in its very discretion, offers a partial but real answer to these questions.

The construction of this axis is not perfect. The political constraints within Japan on arms exports, mentioned by Lazaro herself, still impede cooperation. The Philippines' economic dependencies on China create real vulnerabilities. The American uncertainty under the Trump administration introduces an unpredictable variable in any regional security architecture. And China is not without resources — economic, military, diplomatic — to attempt to fragment this emerging coalition. But for the first time since Xi Jinping accelerated his imperial ambitions in the 2010s, the directly threatened nations have chosen to respond collectively rather than individually. That is a historic turning point.

What the future demands

The South China Sea will be a mirror of the state of the world order in the coming decades. If the Japan-Philippines axis holds, if it expands to other democratic partners in the region, if it is supported by stable American engagement despite Washington's political turbulences — then it will be demonstrated that international law and democratic alliances can constitute a durable counterweight to authoritarian expansionism. If this coalition fragments, if Chinese economic pressures prove too strong, if Washington retreats into transactional isolationism — then the South China Sea will become a Chinese lake, Taiwan will be isolated, and the rules of international law in the seas and skies of the world will be placed back on the altar of brute force. The stakes of the quiet alliance between Tokyo and Manila are not merely regional. They are universal.

Primary Sources

ISW — China & Taiwan Update, June 18, 2026: Chinese maritime operations, Teodoro sanctions, PLAN deployments — June 18, 2026

Japan Ministry of Defense — Japan–Philippines Joint Defense Ministers' Press Statement (RAA, ACSA, FOIP, Balikatan 41-26) — May 5, 2026

Mainichi Shimbun — President Lai Ching-te calls on China to renounce force against Taiwan, Indo-Pacific solidarity — June 19, 2026

Secondary Sources

Al-Ahram / AFP — Taiwan Coast Guard confronts Chinese vessels east of the island, Chinese maritime operations linked to Japan–Philippines negotiations — June 16, 2026

Philippine Star — Manila cites "one theater" South China Sea–East China Sea concept in defense ties with Tokyo — June 11, 2026

Philippine Star — "Mission completed": Chinese floating platform removed from Scarborough Shoal — June 17, 2026

ADNKronos / Jiji Press — Japan, U.S., and Philippines agree to boost maritime security cooperation, second trilateral meeting in Manila — June 8, 2026

China Diplomacy / Xinhua — China says it will not accept Japan and Philippines violating its maritime rights; criticizes EEZ negotiations — June 9, 2026