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China has deployed its maritime law enforcement through the maritime area of the Senkaku islands and unmanned aerial vehicles past remote Japan's territory as China escalates strains following the Japanese prime minister’s remarks regarding Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard announced that its vessels carried out a “lawful patrol operation” through the waters of the Diaoyu islands, which are administered by Japan but also claimed by China.

“China coast guard vessel 1307 formation performed surveillance within the territorial waters of the Senkaku islands. This was a lawful patrol operation undertaken by the Chinese maritime authorities to uphold its rights and interests,” officials declared.

Bilateral Tensions

Beijing and Tokyo have repeatedly faced off around the disputed territory but the recent developments come amid an intensifying diplomatic spat after the Japanese prime minister, Sanae Takaichi, addressed lawmakers that if China attack democratically ruled Taiwan it could trigger a military response from Tokyo.

That sparked an angry response from Beijing, which has indicated it demands a withdrawal from the Japanese official.

Island's Stance

China claims the island as its own territory and plans to incorporate it under what it describes as “unification”. It has not ruled out the use of force. Taiwan’s government and citizens overwhelmingly reject the idea of Beijing's control – preferring to maintain the status quo without formally announcing independence, but pledging to protect their sovereignty if necessary.

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

Defense Operations

On the island, 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, active near the island over the past 24 hours.

Official charts released showed up to multiple UAVs flying between the island and the Japan's territory off its northeastern shoreline, appearing to go unusually near to the nearby Japanese island. Chinese military transits there are not rare, but infrequent, and Beijing's defense operations in the island's ADIZ generally has been minimal in recent weeks.

Late on Saturday, the ministry said China had been carrying out another “joint combat patrol” to “test our defensive capabilities”. It noted the island had dispatched military assets to track the developments. The island documents these operations a few times monthly as part of what Taipei says is an continuous strategic pressure.

Diplomatic Pressure

Japan has been experiencing increased strain from China since the Japanese official made her remarks, with Beijing's diplomatic representative in Osaka prompting a formal protest from Japan by stating that “those who interfere will face consequences”.

Beijing then summoned the Japanese ambassador for the first occasion since 2023, and China’s defence ministry declared that any Japanese intervention would be doomed to fail.

Warning for Citizens

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

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

Adding to the tensions, China’s government on Sunday advised students to rethink education plans 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 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.

Media Response

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 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 major confrontation with unimaginable consequences.”

Policy Standpoints

The government of Taiwan says only its people can decide its future. Officials in Tokyo have traditionally refrained from publicly mentioning Taiwan when addressing potential conflicts, maintaining a “strategic ambiguity” also favoured by Japan's primary defense partner, the United States.

Nevertheless, China’s ruling Communist party says the incorporation of the island with the mainland 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.