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China has deployed its maritime law enforcement into the maritime area of the Diaoyu islands and military drones past outlying Japanese territory as China ramps up strains over the Japan's leader's comments regarding Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard announced that its vessels conducted a “rights enforcement patrol” through the waters of the Diaoyu islands, which are under the control of Tokyo but also claimed by China.

“China coast guard vessel 1307 formation performed surveillance within the territorial waters of the Senkaku islands. This was a lawful patrol operation conducted by the China coast guard to uphold its rights and interests,” the statement said.

Bilateral Tensions

Beijing and Tokyo have repeatedly faced off around the disputed territory but the recent developments come amid an escalating political dispute after the Japanese prime minister, Sanae Takaichi, told parliament that if Beijing assaults democratically ruled Taiwan it could trigger a military response from Japan.

That provoked a furious reaction from Beijing, 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 left open the use of force. Taiwan’s government and people categorically refuse the prospect of Chinese rule – choosing to preserve the current situation without explicitly declaring themselves independent, but pledging to protect their sovereignty if required.

An military assault by Beijing would risk escalating into a international confrontation, possibly drawing in the US and other allies including Japan, which has territory just 110km (68 miles) from the island.

Defense Operations

In Taiwan, the military authorities said on Sunday morning that it had observed three dozen PLA planes, seven navy ships and one government vessel, which was likely the coast guard, active near the territory over the previous day.

Official charts released showed up to three drones operating near the island and the Japanese islands off its northeastern shoreline, seeming to travel particularly close to the nearby Japanese island. PLA movements there are occasional, but infrequent, and Chinese military activity in the island's ADIZ generally has been minimal in recent weeks.

Late on Saturday, the ministry said Beijing had been conducting another “combined military exercise” to “harass the airspace and sea around us”. It added the island had dispatched military assets to track the developments. The island reports such Chinese patrols a couple of times a month as part of what Taipei says is an ongoing military pressure campaign.

Political Strain

Japan has been facing mounting pressure from Beijing since the Japanese official made her remarks, with Beijing's diplomatic representative in Osaka triggering an official complaint from Japan by stating that “those who interfere will face consequences”.

Beijing then summoned the Japanese ambassador for the first time in more than two years, and Beijing's military authorities declared that any Tokyo's involvement would be certain to collapse.

Travel and Education Advisory

Late last week, Beijing advised its people to avoid visiting Japan, leading Japan to request China to take “suitable actions”, though it provided no details.

Multiple carriers from China said on Saturday 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 characterized as an volatile safety situation.

Although not an outright prohibition, a significant decrease in the number of Chinese students could have a negative impact on academic institutions in Japan. A historic high of over 336,000 international students were studying in Japan last year, according to education statistics. They included more than 123,000 Chinese students – by far the single biggest group.

Media Response

Late on Saturday, a official press commentary accused Takaichi of staging a diplomatic maneuver that was “not just dangerously provocative but fundamentally perverse”.

“A clash between Tokyo and Beijing would not be a limited skirmish; it would likely draw in other nations, including the United States, and could rapidly escalate to a major confrontation with severe repercussions.”

Strategic Positions

The administration in Taipei says the island's residents alone determine their destiny. Officials in Tokyo have previously avoided publicly mentioning Taiwan when discussing such scenarios, maintaining a “strategic ambiguity” also preferred by Japan's primary defense partner, the United States.

Nevertheless, China’s ruling Communist party says the incorporation of the island with the mainland China is “inevitable”, and portrays dissent as provocative. As it moves towards being capable of military annexation, Beijing has also been increasing its political operations and its rhetoric towards Taiwan.