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Beijing has sent its coast guard 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 Taiwan.

Patrol Operations

On Sunday, the Chinese coast guard stated that its vessels conducted a “rights enforcement patrol” through the territorial seas of the Senkaku, which are administered by Japan but also claimed by China.

“Chinese maritime patrol unit 1307 conducted patrols within the territorial waters of the Senkaku islands. This was a lawful patrol operation conducted by the Chinese maritime authorities to uphold its rights and interests,” officials declared.

Diplomatic Spat

Beijing and Tokyo have repeatedly faced off around the islands but the latest activity come amid an escalating political dispute after the Japan's leader, Sanae Takaichi, addressed lawmakers that if Beijing assaults democratically ruled Taiwan it might provoke a military response from Japan.

That provoked a furious reaction from China, which has indicated it demands a retraction from Takaichi.

Island's Stance

China claims the island as its own territory and plans to incorporate it under what it describes as “reunification”. It has not ruled out the military option. Taiwan’s government and citizens overwhelmingly reject the prospect of Chinese rule – choosing to preserve the current situation without formally announcing independence, but vowing to defend themselves if required.

An military assault by China would threaten to spiral into a international confrontation, possibly drawing in the US and other partner nations including Tokyo, which has territory just 110km (68 miles) from Taiwan.

Military Activity

On the island, the defence ministry reported this weekend that it had detected three dozen PLA planes, seven navy ships and one government vessel, which was likely the coast guard, active near the territory over the past 24 hours.

Official charts released showed up to multiple UAVs operating near the island and the Japanese islands off its northeastern shoreline, seeming to travel unusually near to Yonaguni. Chinese military transits there are occasional, but uncommon, and Chinese military activity in Taiwan’s air defence identification zone generally has been minimal in recent weeks.

Late on Saturday, the ministry said Beijing had been conducting another “joint combat patrol” to “harass the airspace and sea around us”. It noted Taiwan had sent its own aircraft and ships to track the developments. 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 Beijing since Takaichi made her remarks, with Beijing's diplomatic representative in Osaka prompting a formal protest from Tokyo by stating that “those who interfere will face consequences”.

China then summoned the Japanese ambassador for the first occasion since 2023, and China’s defence ministry stated that any Tokyo's involvement would be doomed to fail.

Warning for Citizens

On Friday, China advised its people to avoid visiting Japan, leading Japan to request China to take “appropriate measures”, though it did not elaborate.

Multiple carriers from China announced this weekend that tickets to Japan could be refunded or changed for free.

Adding to the tensions, China’s government on Sunday urged its citizens to “carefully reconsider” studying in Japan, citing what it characterized as an unstable security environment.

While the advice does not amount to a ban, a significant decrease in the population of learners from China could have a negative impact on Japanese universities. A historic high of over 336,000 international students were studying in Japan last year, according to education statistics. They featured over 123,000 learners from China – by far the single biggest group.

Official Commentary

Late on Saturday, a Chinese state media editorial charged the Japanese official with performing a diplomatic maneuver that was “both reckless and fundamentally flawed”.

“A conflict between Japan and China would not be a small-scale encounter; it would likely draw in other nations, including the US, and could rapidly escalate to a large-scale conflict with unimaginable consequences.”

Policy Standpoints

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 “deliberate vagueness” also preferred by Japan's primary defense partner, the US.

Nevertheless, Beijing's governing party says the unification of Taiwan 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 statements towards Taiwan.