China Says Its Taiwan Posture Is Also About Japan and the Philippines

On July 2, China's Taiwan Affairs Office did something unusual. It explained why its coast guard ships circle Taiwan, and the explanation named not Taiwan but Japan and the Philippines.

Our actions are reasonable, lawful, legitimate, and necessary. — Taiwan Affairs Office of the State Council

Four days later, Taiwan tracked a record 110 Chinese naval and coast guard vessels spread along the First Island Chain — the highest count ever recorded, with formations positioned south of Japan's Amami Ōshima and off the Philippines' Santa Ana coast ^[1]. What looked like a Taiwan escalation was, by China's own framing, also a response to something happening far to the south: a ring of maritime cooperation tightening around China's periphery. That ring has been forming since May. On May 26, the Philippines and Japan elevated bilateral ties to a Comprehensive Strategic Partnership — Japan's second-highest diplomatic tier — including intelligence-sharing negotiations and Japan's first-ever export of lethal military equipment, Abukoma-class destroyers, to Manila, both sides citing shared concerns over China ^[2]. Days earlier, Vietnam and the Philippines had upgraded to an Enhanced Strategic Partnership, with both leaders declaring freedom of navigation in the South China Sea non-negotiable ^[3]. On June 4, Japan and the Philippines opened formal maritime boundary delimitation talks in waters east of Taiwan — the specific talks China later cited as provocation ^[4]. Indonesia finalized BrahMos anti-ship missile purchases from India on July 4, becoming the third Southeast Asian nation after the Philippines and Vietnam to field the system ^[5]. The US was expanding Coast Guard deployments to Guam and the Philippines ^[6]. China has responded to the Japan-Philippines axis with particular sharpness. When the delimitation talks began in early June, Beijing deployed naval and coast guard forces around Scarborough Shoal and declared the talks illegal and null ^[7]. When the US, UK, France, and Germany issued a coordinated condemnation of Chinese maritime operations east of Taiwan on June 24, China's Foreign Ministry again framed its actions as a response to Japan's and the Philippines' manipulation of maritime delimitation issues ^[8]. China personally sanctioned Philippine Defense Secretary Gilberto Teodoro Jr. and his family on June 11 — even as Teodoro was simultaneously building visiting forces agreements with Japan, France, Canada, and New Zealand ^[9]. The linkage Beijing drew was specific to Tokyo and Manila. No Chinese official statement has connected the Taiwan posture to the Vietnam-Philippines partnership, the Indonesia missile deal, or the Australia-Fiji pact. But the broader coalition hardening provides the strategic context in which China chose to make its Japan-Philippines framing explicit. The escalation that followed was not a single-day spike but a week-long curve. Seven naval vessels appeared on June 29 ^[10]. Twenty-two aircraft sorties came on July 2, then 30 sorties with 26 crossing the median line on July 3 ^[11]. The curve crested across July 5 and 6. On July 5, China and Russia opened the Joint Sea-2026 naval exercises off Qingdao, running through July 13 with follow-on joint Pacific patrols planned — built on agreements signed at the May Putin-Xi summit ^[12]. That same day in Suva, Australia and Fiji signed the Ocean of Peace Alliance, a mutual defense treaty making Fiji Australia's fourth regional ally ^[13]. On July 6, Taiwan logged the record 110 vessels ^[1], and China test-fired a nuclear-capable long-range ballistic missile from a submarine into the South Pacific ^[14]. Some analysts suggested the missile test coincided with the Australia-Fiji pact signed the day before, though no official has confirmed the linkage ^[14]. Also on July 6, the Philippine Senate convened as an impeachment court to try Vice President Sara Duterte on four articles including misuse of 612.5 million pesos in confidential funds and alleged assassination threats against President Marcos Jr. ^[15]. The charges are domestic — corruption, not China policy — and the Marcos administration has continued advancing defense diplomacy throughout the impeachment process. The Japan partnership was signed in May, the Vietnam partnership days earlier, the maritime boundary talks launched in June, all while the proceedings were already underway ^[2][3][4]. The impeachment is a separate clock, and its potential seven-to-eight-month timeline raises a question that has nothing to do with China: whether Manila's political bandwidth can sustain the coalition-building pace its own diplomacy now demands. Taiwan's own institutions split on what the escalation means. The Coast Guard Administration characterized China's actions as grey-zone tactics to normalize its presence and reshape the status quo without triggering open conflict ^[16]. Coast Guard personnel described a change to the informal boundary that held for decades in the Taiwan Strait.

They have already erased the median line. — Yeh Chih-sheng

But Taiwan's National Security Bureau director attributed the naval surge to the July-to-September seasonal peak for exercises — cyclical rather than a standing posture ^[17]. Defense Minister Wellington Koo cut in a different direction. He stated that the window Taiwan would have to respond to an attack is shrinking, and launched five-day combat-readiness drills to test whether the island can shift to a wartime footing fast enough ^[18].

It is intended to build the speed we believe is necessary for converting from peacetime to wartime status — Wellington Koo

Whether the surge is seasonal or structural, Taiwan's defense minister frames the trajectory as one-directional. The distinction matters beyond semantics. If China's Taiwan posture is, as Beijing now says, also a response to Japan-Philippines maritime cooperation, then every new delimitation agreement, destroyer sale, or anti-ship missile battery installed along the First Island Chain carries a cost measured in Chinese ships around Taiwan. The coalition is designed to raise the price of Chinese maritime operations. China's answer, increasingly explicit, is to raise the pressure on Taiwan. The next test is whether that answer accelerates when the next coalition move lands — or whether the word "seasonal" buys anyone time.