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Beijing has sent its coast guard into the waters of the Senkaku islands and unmanned aerial vehicles near outlying Japan's territory as Beijing ramps up strains over the Japanese prime minister’s comments regarding the island of Taiwan.

Patrol Operations

This past 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 Tokyo but also asserted as territory by Beijing.

“Chinese maritime patrol unit 1307 performed surveillance within the maritime jurisdiction of the Senkaku islands. This was a legitimate rights enforcement activity conducted by the China coast guard to uphold its rights and interests,” officials declared.

Bilateral Tensions

Beijing and Tokyo have consistently clashed around the disputed territory but the recent developments come amid an intensifying diplomatic spat after the Japan's leader, Sanae Takaichi, addressed lawmakers that if Beijing assaults democratically ruled Taiwan it could trigger a armed reaction from Tokyo.

That provoked a furious reaction from China, which has signalled it expects a retraction from Takaichi.

Island's Stance

China claims Taiwan as its own territory and intends to annex it under what it terms “reunification”. It has not ruled out the use of force. Taiwan’s government and people categorically refuse the idea of Beijing's control – preferring to maintain the status quo without explicitly declaring themselves independent, but vowing to defend themselves if necessary.

An attack or invasion by China would risk escalating into a international confrontation, potentially involving the United States and other partner nations including Tokyo, which has territory just 110km (68 miles) from Taiwan.

Defense Operations

On the island, the defence ministry reported this weekend that it had detected 30 Chinese military aircraft, seven navy ships and one government vessel, which was probably the maritime patrol, operating around the territory over the past 24 hours.

Maps provided by the ministry showed up to three drones flying between Taiwan and the Japan's territory off its northeastern shoreline, appearing to go unusually near to Yonaguni. Chinese military transits there are occasional, but uncommon, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been low in recent weeks.

Earlier this weekend, the defense officials said Beijing had been conducting another “joint combat patrol” to “test our defensive capabilities”. It noted the island had sent its own aircraft and ships to track the developments. The island documents these operations a couple of times a month as part of what Taipei says is an continuous strategic pressure.

Political Strain

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

Beijing then called in Japan's diplomat for the first occasion since 2023, and China’s defence ministry declared that any Japanese intervention would be certain to collapse.

Travel and Education Advisory

On Friday, China cautioned its citizens against travelling to Japan, leading Japan to request China to take “suitable actions”, though it provided no details.

Three Chinese airlines said on Saturday that tickets to Japan could be refunded or changed for free.

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 detrimental effect 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

Earlier this weekend, 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 quickly spiral into 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 traditionally refrained from discussing the island openly when addressing potential conflicts, maintaining a “strategic ambiguity” also favoured by Japan's primary defense partner, the US.

Nevertheless, Beijing's governing party says the incorporation of the island with the mainland China is “inevitable”, and portrays dissent as provocative. As it advances toward potential armed takeover, Beijing has also been escalating its non-military activity and its statements towards the island.