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Beijing has deployed its coast guard through the waters of the Senkaku islands and military drones near remote Japanese territory as China escalates tensions over the Japanese prime minister’s remarks regarding Taiwan.

Patrol Operations

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 under the control of Tokyo but also claimed by China.

“China coast guard vessel 1307 formation performed surveillance within the territorial waters of the Diaoyu islands. This was a lawful patrol operation undertaken by the Chinese maritime authorities to protect its sovereign claims,” officials declared.

Diplomatic Spat

Beijing and Tokyo have consistently clashed around the islands but the latest activity come amid 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 armed reaction from Japan.

That provoked a furious reaction from China, which has indicated it demands a retraction from the Japanese official.

Island's Stance

Beijing asserts the island as its sovereign land and intends to annex it under what it describes as “unification”. It has left open the military option. The island's administration and citizens categorically refuse the prospect of Chinese rule – preferring to maintain the current situation without formally announcing independence, but vowing to defend themselves if required.

An military assault by China would risk escalating into a international confrontation, potentially involving the United States and other partner nations including Japan, which has territory just 68 miles from the island.

Defense Operations

On the island, the military authorities said on Sunday morning that it had detected 30 Chinese military aircraft, multiple naval vessels and one “official” ship, which was likely the coast guard, operating around the territory over the past 24 hours.

Maps provided by the ministry showed up to three drones operating near the island and the Japanese islands off its north-east coast, appearing to go particularly close to the nearby Japanese island. PLA movements there are occasional, but infrequent, and Beijing's defense operations 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 added Taiwan had dispatched military assets to monitor the situation. The island documents these operations a couple of times a month as part of what the Taiwanese government says is an ongoing military pressure campaign.

Political Strain

Tokyo has been experiencing increased strain from Beijing since Takaichi made her remarks, with Beijing's diplomatic representative in the Japanese city triggering an official complaint from Japan by commenting that “the dirty head that sticks itself out must be cut off”.

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

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.

Adding to the tensions, China’s government on the weekend advised students to rethink education plans in Japan, citing what it characterized as an volatile safety situation.

Although not an outright prohibition, a dramatic reduction 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 largest demographic.

Official Commentary

Earlier this weekend, a Chinese state media editorial accused Takaichi of staging a diplomatic maneuver that was “both reckless and fundamentally flawed”.

“A conflict between Japan and China would not be a limited skirmish; it would probably involve other nations, including the US, and could rapidly escalate to a major confrontation with severe repercussions.”

Policy Standpoints

The administration in Taipei says only its people can decide its future. Japanese leaders have traditionally refrained from discussing the island openly when addressing potential conflicts, maintaining a “strategic ambiguity” also favoured by Tokyo’s main security ally, the United States.

However, Beijing's governing party says the unification of Taiwan with the People’s Republic of China is “inevitable”, and portrays dissent as provocative. As it moves towards being capable of military annexation, China has also been increasing its political operations and its rhetoric towards Taiwan.