China Coast Guard Patrol Sparks Tensions Over Taiwan Waters Amid Japan-Philippines Talks

China’s Coast Guard said on Monday that it had carried out what it described as “law enforcement” patrols in waters east of Taiwan, amid rising regional tensions linked to planned maritime boundary negotiations between Japan and the Philippines.

The announcement came after Japan and the Philippines confirmed last week that they intend to begin formal talks on delimiting their exclusive economic zones and continental shelf boundaries in accordance with international law. While both governments did not publicly specify the exact scope of the discussions, Beijing argued that the area involved includes waters east of Taiwan, a region China claims as its own.

China’s foreign ministry previously stated that any such negotiations covering the area are “completely illegal, null and void,” reinforcing its position that Taiwan and surrounding waters fall under Chinese sovereignty.

In its statement on Monday, the China Coast Guard said a fleet conducted patrols “in accordance with the law” in waters east of Taiwan, without providing precise coordinates. It added that the operation was a response to what it called unilateral steps by Japan and the Philippines.

“This is a necessary action taken in response to Japan and the Philippines unilaterally announcing the initiation of maritime boundary delimitation negotiations in the waters east of China’s Taiwan island,” the statement said. It also urged both countries to “immediately cease all illegal actions that infringe upon China’s sovereign rights and interests.”

Taiwan’s coast guard did not immediately comment on the incident. Diplomatic missions from Japan and the Philippines in Beijing also did not respond to requests for reaction.

However, Taiwan’s foreign ministry rejected Beijing’s position late on Sunday, saying China had no authority to interfere in what it described as Taiwan’s territorial sovereignty and maritime rights.

China continues to assert claims over Taiwan and vast areas of the South China Sea under its so-called “nine-dash line,” a demarcation that overlaps with the exclusive economic zones of several Southeast Asian countries, including the Philippines, Vietnam, Malaysia, Brunei, and Indonesia. Taiwan’s government rejects these claims.

The latest patrol adds to a pattern of near-daily Chinese military and coast guard activity around Taiwan, which often includes the deployment of warships and aircraft. In some cases, Chinese coast guard vessels have moved close to disputed or sensitive islands, including a recent incident near the Taiwan-controlled Pratas Islands, where a stand-off occurred before the vessels withdrew.

Regional tensions over maritime boundaries remain high as competing claims continue to overlap across East and Southeast Asia, raising concerns among neighbouring states and international observers about the risk of further escalation.