Following the Japan-Philippines Summit Meeting on May 28, 2026, Japan and the Philippines announced plans to negotiate the boundaries of their overlapping Exclusive Economic Zones (EEZs) and continental shelves in the waters east of Taiwan. The stated goals of this initiative include clarifying resource development scope, bolstering maritime security and defense cooperation, and establishing measures to prevent unforeseen clashes. While Japan views this as a model for peaceful resolution under the United Nations Convention on the Law of the Sea (UNCLOS) and international law, China has strongly protested the move. Because Beijing considers Taiwan part of its territory, it claims rights over these eastern waters and objects to any boundary negotiations that exclude its involvement.
China’s interest in the region is long-standing. Beyond the nine-dash line in the South China Sea, the "2023 edition of China’s standard map," released by the Ministry of Natural Resources on August 28, 2023, introduced a tenth dash line east of Taiwan, underscoring its territorial claims. The People’s Liberation Army has since increased activity in the area, including the deployment of carrier groups and exercises that suggest preparations for an invasion of Taiwan from the east.
In June 2026, the China Coast Guard (CCG) began conducting law enforcement patrols off Taiwan’s eastern coast, a move synchronized with Beijing's diplomatic criticism of Japan and the Philippines. These activities are being presented as a response to the boundary negotiations, which China characterizes as an incident requiring a firm reaction. This approach aligns with an established strategy of using specific events to normalize previously non-existent law enforcement activities and shift the status quo.
Observers note parallels to the February 2024 Kinmen Islands episode, where the CCG moved to normalize patrols in Xiamen-Kinmen waters following a fatal incident involving Chinese fishermen. Similarly, in September 2012, Beijing began routine coast guard intrusions into Senkaku territorial waters following the Japanese government’s nationalization of private land there. By exploiting such incidents, China effectively forces changes to the status quo.
This escalation also occurs against a backdrop of heightened rhetoric. Since Japanese Prime Minister Takaichi Sanae described the regional climate as a "situation threatening national survival" on November 7, 2025, China has intensified its criticism of Tokyo, labeling its foreign policy as "neo-militarism." By framing its own actions as a justified response to the initiatives of Japan and other nations, China continues to build a narrative to support its expanding presence in the Western Pacific.
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