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Beijing has deployed its coast guard into the waters of the Diaoyu islands and military drones near remote Japanese territory as China ramps up tensions following the Japanese prime minister’s remarks regarding Taiwan.

Patrol Operations

On Sunday, the China's maritime patrol stated that its ships conducted a “lawful patrol operation” through the territorial seas of the Senkaku, which are under the control of Tokyo but also asserted as territory by Beijing.

“China coast guard vessel 1307 formation conducted patrols within the maritime jurisdiction of the Senkaku islands. This was a legitimate rights enforcement activity conducted by the China coast guard to protect its sovereign claims,” officials declared.

Diplomatic Spat

Beijing and Tokyo have consistently clashed around the islands but the recent developments occur during an escalating political dispute after the Japan's leader, Sanae Takaichi, addressed lawmakers 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 the Japanese official.

Island's Stance

Beijing asserts Taiwan as its own territory and plans to incorporate it under what it terms “reunification”. It has not ruled out the use of force. Taiwan’s government and citizens categorically refuse the prospect of Chinese rule – preferring to maintain the status quo without explicitly declaring themselves independent, but pledging to protect their sovereignty if required.

An military assault by Beijing would threaten to spiral into a international confrontation, potentially involving the United States and other partner nations including Tokyo, which has territory just 68 miles from the island.

Military Activity

On the island, the military authorities said on Sunday morning that it had observed three dozen PLA planes, multiple naval vessels and one “official” ship, which was likely the maritime patrol, operating around the island over the past 24 hours.

Official charts released showed up to multiple UAVs operating near Taiwan and the Japanese islands off its northeastern shoreline, appearing to go particularly close to Yonaguni. Chinese military transits there are not rare, but uncommon, and Chinese military activity in the island's ADIZ generally has been low in the past month.

Earlier this weekend, the ministry said Beijing had been carrying out another “combined military exercise” to “harass the airspace and sea around us”. It noted Taiwan had dispatched military assets to monitor the situation. Taiwan reports such Chinese patrols a couple of times a month as part of what the Taiwanese government says is an continuous strategic pressure.

Political Strain

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 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 declared that any Japanese intervention would be certain to collapse.

Warning for Citizens

Late last week, China advised its people to avoid visiting Japan, leading Japan to request China to take “suitable actions”, though it provided no details.

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

Adding to the tensions, China’s government on Sunday 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 negative impact on academic institutions in Japan. A record 336,708 foreign nationals 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

Late on Saturday, a Chinese state media editorial 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 probably involve other nations, including the United States, and could quickly spiral into a major confrontation with severe repercussions.”

Policy Standpoints

The administration in Taipei says the island's residents alone determine their destiny. Japanese leaders have traditionally refrained from publicly mentioning Taiwan when discussing such scenarios, maintaining a “deliberate vagueness” also favoured by Tokyo’s main security ally, the United States.

Nevertheless, China’s ruling Communist party says the incorporation of the island with the People’s Republic of China is “unavoidable”, 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.