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Beijing has sent its maritime law enforcement into the maritime area of the Diaoyu islands and unmanned aerial vehicles past outlying Japanese territory as China escalates tensions following the Japan's leader's remarks regarding the island of Taiwan.

Patrol Operations

On Sunday, the China's maritime patrol announced that its vessels conducted a “lawful patrol operation” through the territorial seas of the Senkaku, which are under the control of Tokyo but also claimed by China.

“China coast guard vessel 1307 formation conducted patrols within the territorial waters of the Senkaku 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 disputed territory but the recent developments come amid an intensifying diplomatic spat after the Japan's leader, the Japanese official, told parliament that if China attack the self-governing island of Taiwan it could trigger a military response from Tokyo.

That sparked an angry response from Beijing, which has signalled it expects a retraction from the Japanese official.

Island's Stance

China claims the island as its sovereign land and intends to annex it under what it terms “unification”. It has not ruled out the use of force. Taiwan’s government and people categorically refuse the prospect of Chinese rule – choosing to preserve 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 United States and other allies including Tokyo, which has land just 110km (68 miles) from Taiwan.

Defense Operations

On the island, the defence ministry said on Sunday morning that it had observed 30 Chinese military aircraft, multiple naval vessels and one government vessel, which was likely the maritime patrol, operating around the island over the past 24 hours.

Maps provided by the ministry showed up to three drones operating near the island and the Japan's territory off its northeastern shoreline, appearing to go particularly close to Yonaguni. Chinese military transits there are not rare, but infrequent, and Beijing's defense operations in the island's ADIZ generally has been low in the past month.

Late on Saturday, the defense officials said Beijing had been conducting another “combined military exercise” to “harass the airspace and sea around us”. It noted the island had dispatched military assets to track the developments. Taiwan reports such Chinese patrols a few times monthly as part of what Taipei says is an continuous strategic pressure.

Diplomatic Pressure

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

Beijing then called in Japan's diplomat 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, prompting Tokyo to urge Beijing to take “appropriate measures”, 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, Beijing's administration on the weekend advised students to rethink education plans in Japan, citing what it described as an volatile safety situation.

Although not an outright prohibition, a significant decrease in the population of learners from China could have a detrimental effect on Japanese universities. A record 336,708 foreign nationals were enrolled in Japanese schools last year, according to education statistics. They featured over 123,000 learners from China – by far the single biggest group.

Media Response

Earlier this weekend, 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 probably involve other powers, including the US, 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. Japanese leaders have previously avoided publicly mentioning Taiwan when discussing such scenarios, maintaining a “deliberate vagueness” also favoured by Japan's primary defense partner, the US.

Nevertheless, China’s ruling Communist party says the incorporation of the island with the People’s Republic of China is “inevitable”, and casts any opposition to it as escalatory. As it moves towards being capable of military annexation, China has also been increasing its political operations and its statements towards Taiwan.