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Beijing has sent its coast guard into the maritime area of the Senkaku islands and military drones past outlying Japanese territory as China escalates strains following the Japan's leader's comments regarding Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard stated that its vessels carried out a “lawful patrol operation” through the territorial seas of the Diaoyu islands, 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 Diaoyu islands. This was a lawful patrol operation conducted by the Chinese maritime authorities to uphold its rights and interests,” the statement said.

Diplomatic Spat

China and Japan have repeatedly faced off around the islands but the recent developments occur during an escalating political dispute after the Japanese prime minister, Sanae Takaichi, told parliament that if Beijing assaults the self-governing island of Taiwan it could trigger a military response from Japan.

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

Island's Stance

Beijing asserts Taiwan as its own territory and plans to incorporate it under what it terms “reunification”. It has left open the military option. Taiwan’s government and citizens categorically refuse the prospect of Chinese rule – choosing to preserve the current situation without formally announcing independence, but pledging to protect their sovereignty if necessary.

An attack or invasion 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 the island.

Defense Operations

In Taiwan, the military authorities reported this weekend that it had detected 30 Chinese military aircraft, multiple naval vessels and one government vessel, which was likely the maritime patrol, operating around the territory over the previous day.

Maps provided by the ministry showed up to multiple UAVs flying between the island and the Japan's territory off its northeastern shoreline, appearing to go particularly close to Yonaguni. PLA movements there are occasional, but infrequent, and Chinese military activity in Taiwan’s air defence identification zone generally has been low in the past month.

Late on Saturday, the ministry said Beijing had been carrying out another “combined military exercise” to “test our defensive capabilities”. It noted Taiwan had dispatched military assets to track the developments. The island reports such Chinese patrols a few times monthly as part of what Taipei says is an continuous strategic pressure.

Diplomatic Pressure

Japan has been facing mounting pressure from China since the Japanese official made her remarks, with Beijing's diplomatic representative in the Japanese city prompting a formal protest from Tokyo by commenting that “those who interfere will face consequences”.

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

Warning for Citizens

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

Three Chinese airlines announced this weekend that tickets to Japan could be cancelled without penalty.

In another escalation, Beijing's administration on the weekend advised students to rethink education plans in Japan, citing what it described as an volatile safety situation.

While the advice does not amount to a ban, a dramatic reduction in the number of Chinese students 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 official data. They included more than 123,000 Chinese students – 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 clash between Tokyo and Beijing would not be a small-scale encounter; it would likely draw in other powers, including the United States, and could quickly spiral into a major confrontation with severe repercussions.”

Strategic Positions

The government of Taiwan says only its people can decide its future. 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 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 rhetoric towards the island.