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Beijing has sent its coast guard into the maritime area of the Senkaku islands and military drones near remote Japan's territory as Beijing escalates tensions over the Japan's leader's comments regarding Taiwan.

Patrol Operations

This past Sunday, the Chinese coast guard announced that its vessels conducted a “lawful patrol operation” through the waters of the Diaoyu islands, which are administered by Tokyo 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 China coast guard to uphold its rights and interests,” the statement said.

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, told parliament that if China attack democratically ruled Taiwan it could trigger a armed reaction from Japan.

That sparked an angry response from Beijing, which has indicated it demands a retraction from Takaichi.

Taiwan's Position

China claims the island as its own territory and intends to annex it under what it terms “unification”. It has left open the use of force. The island's administration and people overwhelmingly reject 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 military assault by Beijing would threaten to spiral into a international confrontation, possibly drawing in the US and other partner nations including Tokyo, which has land just 68 miles from the island.

Military Activity

In Taiwan, the defence ministry reported this weekend that it had observed three dozen PLA planes, seven navy ships and one “official” ship, which was likely 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 Japanese islands off its north-east coast, appearing to go unusually near to the nearby Japanese island. Chinese military transits there are not rare, but uncommon, and Chinese military activity in the island's ADIZ generally has been low in recent weeks.

Earlier this weekend, the defense officials 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 monitor the situation. Taiwan documents these operations a couple of times a month as part of what Taipei says is an continuous strategic pressure.

Political Strain

Japan has been facing mounting pressure from Beijing since Takaichi made her remarks, with China’s consul general in Osaka prompting a formal protest from Japan by commenting that “those who interfere will face consequences”.

Beijing then called in Japan's diplomat for the first occasion since 2023, and Beijing's military authorities declared that any Tokyo's involvement 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 did not elaborate.

Multiple carriers from China announced this weekend 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.

While the advice does not amount to a ban, a dramatic reduction in the number of Chinese students could have a detrimental effect 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 largest demographic.

Media Response

Late on Saturday, a official press commentary 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 powers, including the United States, and could rapidly escalate to a large-scale conflict with unimaginable consequences.”

Strategic Positions

The government of Taiwan says the island's residents alone determine their destiny. Japanese leaders have previously avoided discussing the island openly when addressing potential conflicts, maintaining a “deliberate vagueness” also favoured by Japan's primary defense partner, the United States.

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