China has opened a new point of maritime pressure east of Taiwan after launching what Beijing described as a special maritime law-enforcement operation in response to planned boundary talks between Japan and the Philippines.
The operation, announced through Chinese state channels, follows the decision by Tokyo and Manila to begin maritime delimitation talks concerning their exclusive economic zones and continental shelves. The talks were agreed during a Tokyo summit between Japanese Prime Minister Sanae Takaichi and Philippine President Ferdinand Marcos Jr, where the two governments also set out plans for wider strategic and security co-operation.
Beijing has objected to the process, arguing that any delimitation east of Taiwan should include China. Its position rests on the claim that Taiwan forms part of China and that maritime rights connected to the island therefore fall under Chinese jurisdiction. Taiwan rejects that claim and has welcomed the use of international law and peaceful dialogue to settle maritime boundaries.
The dispute concerns more than a technical disagreement over lines on a maritime chart. An exclusive economic zone gives a coastal state specific rights over fisheries, seabed resources and energy exploration, but it does not give full sovereignty over the sea itself. Under the United Nations Convention on the Law of the Sea, other states retain rights of navigation and overflight. For that reason, China’s operation is being framed as law enforcement, although such deployments also serve a wider political and strategic purpose.
The waters east and south-east of Taiwan sit within a sensitive maritime corridor linking the East China Sea, the Philippine Sea, the South China Sea and the wider Pacific. They also lie near the so-called first island chain, running from Japan through Taiwan and the Philippines. For Beijing, this geography is central to its ability to project naval power beyond its near seas. For Japan, Taiwan and the Philippines, it is tied to sea-lane security, deterrence and the protection of existing maritime rights.
The immediate trigger for China’s move was the Japan–Philippines decision to clarify overlapping maritime claims between themselves. Tokyo and Manila present this as a bilateral legal process conducted under international rules. Beijing, however, has described the talks as “illegal and invalid”, arguing that they affect waters in which China claims rights through Taiwan.
This places the latest operation within a broader pattern of Chinese maritime conduct. Beijing has increasingly used coastguard vessels, maritime militia, survey ships and naval deployments to assert claims without necessarily crossing the threshold into open military confrontation. Such activity allows China to test the response of neighbouring states, establish patterns of presence, and gradually normalise its own jurisdictional claims.
Taiwan has already reported Chinese coastguard and research vessel activity near the Pratas Islands, a Taiwan-controlled outpost in the northern South China Sea. Taipei said it had deployed vessels after Chinese ships conducted what it viewed as a co-ordinated operation near the islands. The Pratas Islands are geographically distant from Taiwan’s main island and are seen as strategically exposed.
Separately, Japan has reported Chinese carrier activity in the western Pacific. According to Tokyo, the aircraft carrier Liaoning conducted drills east of the Philippines in late May, including aircraft and helicopter take-offs and landings. The timing adds to the perception that Beijing is increasing operational pressure across several connected maritime zones at once.
For Japan, the central question is whether China’s operation is primarily symbolic or whether it is intended to obstruct the practical work of maritime delimitation. Japan has a capable maritime self-defence force and has been expanding security co-operation with the Philippines. Manila, by contrast, has more limited naval capacity and has increasingly relied on security partnerships with the United States, Japan and Australia to counter Chinese pressure.
The risk lies not necessarily in a planned military clash, but in miscalculation. Law-enforcement patrols can involve close manoeuvring, warning broadcasts, blocking tactics and competing orders to leave an area. In a contested maritime zone, such encounters can escalate quickly, especially if coastguard deployments are supported by naval forces nearby.
The wider issue remains Taiwan. Beijing’s insistence that it has jurisdiction over waters connected to Taiwan is part of its broader effort to assert control over the island’s external space. Each patrol, inspection or law-enforcement operation contributes to a cumulative change in the regional environment, even without a formal blockade or direct military assault.
The Japan–Philippines talks therefore carry significance beyond maritime administration. If Tokyo and Manila proceed despite Chinese objections, they will signal that Beijing cannot veto boundary negotiations between other regional states. If the process is delayed or weakened under pressure, China may treat the operation as a successful precedent.
For now, the move does not amount to an invasion or an immediate military operation against Taiwan. It is, however, another example of China using maritime enforcement to advance strategic claims. In the western Pacific, the distinction between coastguard patrol, political coercion and military signalling is becoming increasingly narrow.
