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Beijing has sent its maritime law enforcement through the waters of the Senkaku islands and unmanned aerial vehicles past remote Japanese territory as Beijing escalates strains following the Japan's leader's comments regarding Taiwan.

Patrol Operations

This past Sunday, the Chinese coast guard announced that its ships carried out a “lawful patrol operation” through the waters of the Senkaku, which are administered by Japan but also asserted as territory by Beijing.

“Chinese maritime patrol unit 1307 conducted patrols within the maritime jurisdiction of the Senkaku islands. This was a legitimate rights enforcement activity conducted by the Chinese maritime authorities to protect its sovereign claims,” the statement said.

Bilateral Tensions

Beijing and Tokyo have consistently clashed around the islands but the latest activity occur during an intensifying diplomatic spat after the Japan's leader, Sanae Takaichi, told parliament that if China attack democratically ruled Taiwan it might provoke a armed reaction from Japan.

That sparked an angry response from Beijing, which has signalled it expects a withdrawal from Takaichi.

Taiwan's Position

Beijing asserts Taiwan as its own territory and intends to annex it under what it describes as “reunification”. It has left open the military option. The island's administration and citizens categorically refuse the idea of Beijing's control – choosing to preserve the current situation without formally announcing independence, but vowing to defend themselves if necessary.

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

Military Activity

In Taiwan, the military authorities said on Sunday morning that it had observed 30 Chinese military aircraft, seven navy ships and one “official” ship, which was likely the maritime patrol, active near the island over the past 24 hours.

Maps provided by the ministry showed up to multiple UAVs operating near the island and the Japan's territory off its north-east coast, appearing to go particularly close to Yonaguni. PLA movements there are not rare, but uncommon, and Chinese military activity in Taiwan’s air defence identification zone generally has been minimal in the past month.

Late on Saturday, the defense officials said Beijing had been carrying out another “joint combat patrol” to “harass the airspace and sea around us”. It noted Taiwan 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 continuous strategic pressure.

Political Strain

Tokyo has been experiencing increased strain from China since the Japanese official made her comments, with Beijing's diplomatic representative in Osaka triggering an official complaint from Tokyo by commenting that “the dirty head that sticks itself out must be cut off”.

China then summoned the Japanese ambassador for the first occasion since 2023, and Beijing's military authorities stated that any Japanese intervention would be certain to collapse.

Warning for Citizens

Late last week, Beijing cautioned its citizens against travelling to Japan, prompting Tokyo to urge Beijing to take “appropriate measures”, though it provided no details.

Three Chinese airlines said on Saturday that flights to Tokyo could be cancelled without penalty.

In another escalation, China’s government on the weekend advised students to rethink education plans in Japan, citing what it described as an unstable security environment.

Although not an outright prohibition, a significant decrease in the population of learners from China 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 official data. They included more than 123,000 Chinese students – by far the largest demographic.

Official Commentary

Late on Saturday, a official press commentary accused Takaichi of staging a diplomatic maneuver that was “both reckless and fundamentally flawed”.

“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 large-scale conflict with unimaginable consequences.”

Policy Standpoints

The government of Taiwan says the island's residents alone determine their destiny. Officials in Tokyo have traditionally refrained from discussing the island openly when discussing such scenarios, maintaining a “deliberate vagueness” also preferred by Japan's primary defense partner, the United States.

Nevertheless, Beijing's governing party says the incorporation of the island with the People’s Republic of China is “unavoidable”, and portrays dissent as provocative. As it advances toward potential armed takeover, China has also been increasing its political operations and its rhetoric towards the island.