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China has sent its maritime law enforcement through the maritime area of the Diaoyu islands and unmanned aerial vehicles near remote Japan's territory as China ramps up strains over the Japan's leader's remarks regarding the island of Taiwan.

Rights Enforcement Activities

On Sunday, the China's maritime patrol stated that its vessels conducted a “rights enforcement patrol” through the waters of the Diaoyu islands, which are under the control of Japan but also claimed by Beijing.

“Chinese maritime patrol unit 1307 conducted patrols within the territorial waters of the Senkaku islands. This was a legitimate rights enforcement activity conducted by the China coast guard to uphold its rights and interests,” the statement said.

Bilateral Tensions

China and Japan have consistently clashed around the islands but the latest activity come amid an escalating political dispute after the Japan's leader, Sanae Takaichi, told parliament that if Beijing assaults the self-governing island of Taiwan it might provoke a military response from Japan.

That provoked a furious reaction from China, which has indicated it demands a withdrawal from the Japanese official.

Taiwan's Position

China claims the island as its sovereign land and plans to incorporate it under what it terms “reunification”. It has not ruled out the military option. The island's administration and citizens categorically refuse the idea of Beijing's control – choosing to preserve the status quo without formally announcing independence, but vowing to defend themselves if necessary.

An attack or invasion by Beijing would threaten to spiral into a regional or global conflict, possibly drawing in the US and other allies including Tokyo, which has territory just 110km (68 miles) from the island.

Defense Operations

In Taiwan, the defence ministry said on Sunday morning that it had observed three dozen PLA planes, multiple naval vessels and one “official” ship, which was likely the coast guard, operating around the island over the previous day.

Maps provided by the ministry showed up to three drones operating near the island and the Japan's territory off its northeastern shoreline, seeming to travel unusually near to the nearby Japanese island. Chinese military transits there are not rare, but infrequent, and Chinese military activity in Taiwan’s air defence identification zone generally has been minimal in the past month.

Late on Saturday, the ministry said Beijing had been conducting another “combined military exercise” to “harass the airspace and sea around us”. It noted the island had sent its own aircraft and ships to monitor the situation. Taiwan documents these operations a few times monthly as part of what Taipei says is an ongoing military pressure campaign.

Political Strain

Tokyo has been experiencing increased strain from Beijing since Takaichi made her comments, with Beijing's diplomatic representative in Osaka prompting a formal protest from Japan by commenting that “the dirty head that sticks itself out must be cut off”.

Beijing then summoned the Japanese ambassador for the first occasion since 2023, and China’s defence ministry declared that any Japanese intervention would be certain to collapse.

Warning for Citizens

Late last week, China advised its people to avoid visiting Japan, prompting Tokyo to urge Beijing to take “suitable actions”, though it did not elaborate.

Multiple carriers from China announced this weekend that tickets to Japan could be cancelled without penalty.

Adding to the tensions, China’s government on Sunday advised students to rethink education plans in Japan, citing what it described as an volatile safety situation.

While the advice does not amount to a ban, a significant decrease in the number of Chinese students could have a negative impact on academic institutions in Japan. A record 336,708 foreign nationals were enrolled in Japanese schools last year, according to official data. They featured over 123,000 learners from China – by far the single biggest group.

Media Response

Earlier this weekend, a Chinese state media editorial charged the Japanese official with performing a diplomatic maneuver that was “not just dangerously provocative but fundamentally perverse”.

“A conflict between Japan and China would not be a small-scale encounter; it would probably involve other nations, including the United States, and could rapidly escalate to a major confrontation with unimaginable consequences.”

Strategic Positions

The government of Taiwan says only its people can decide its future. Officials in Tokyo have previously avoided discussing the island openly when discussing such scenarios, maintaining a “strategic ambiguity” also preferred by Tokyo’s main security ally, the US.

Nevertheless, Beijing's governing party says the incorporation of the island with the People’s Republic of China is “unavoidable”, and casts any opposition to it as escalatory. As it advances toward potential armed takeover, China has also been escalating its non-military activity and its rhetoric towards the island.