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Beijing has deployed its coast guard through the maritime area of the Diaoyu islands and unmanned aerial vehicles near outlying Japan's territory as China ramps up tensions over the Japan's leader's remarks regarding the island of Taiwan.

Patrol Operations

This past Sunday, the Chinese coast guard announced that its ships carried out a “lawful patrol operation” through the territorial seas of the Senkaku, which are administered by Japan but also claimed by Beijing.

“Chinese maritime patrol unit 1307 conducted patrols within the maritime jurisdiction of the Senkaku islands. This was a lawful patrol operation conducted by the Chinese maritime authorities to uphold its rights and interests,” officials declared.

Diplomatic Spat

Beijing and Tokyo have repeatedly faced off around the islands but the recent developments come amid an intensifying diplomatic spat after the Japan's leader, the Japanese official, addressed lawmakers that if China attack the self-governing island of Taiwan it could trigger a armed reaction from Tokyo.

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

Island's Stance

China claims Taiwan as its own territory and intends to annex it under what it describes as “unification”. It has left open the use of force. The island's administration 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 required.

An attack or invasion by China would risk escalating into a international confrontation, possibly drawing in the US and other partner nations including Tokyo, which has land just 68 miles from Taiwan.

Military Activity

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

Maps provided by the ministry showed up to three drones operating near Taiwan and the Japan's territory off its northeastern shoreline, seeming to travel unusually near to the nearby Japanese island. PLA movements there are not rare, but infrequent, and Beijing's defense operations in the island's ADIZ generally has been minimal in the past month.

Late on Saturday, the defense officials said Beijing had been carrying out another “joint combat patrol” to “harass the airspace and sea around us”. It noted the island had sent its own aircraft and ships to monitor the situation. The island reports such Chinese patrols a couple of times a month as part of what Taipei says is an continuous strategic pressure.

Political Strain

Tokyo has been experiencing increased strain from Beijing since Takaichi made her comments, with Beijing's diplomatic representative in Osaka 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 Beijing's military authorities declared that any Tokyo's involvement would be certain to collapse.

Travel and Education Advisory

On Friday, Beijing advised its people to avoid visiting Japan, leading Japan to request China to take “suitable actions”, though it provided no details.

Multiple carriers from China said on Saturday that tickets to Japan could be refunded or changed for free.

Adding to the tensions, Beijing's administration on Sunday urged its citizens to “carefully reconsider” studying in Japan, citing what it described 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 Japanese universities. A record 336,708 foreign nationals were studying in Japan last year, according to education statistics. They included more than 123,000 Chinese students – by far the largest demographic.

Media Response

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

“A clash between Tokyo and Beijing would not be a small-scale encounter; it would probably involve other powers, including the United States, and could quickly spiral into a large-scale conflict with severe repercussions.”

Strategic Positions

The government of Taiwan says the island's residents alone determine their destiny. Japanese leaders have previously avoided publicly mentioning Taiwan when addressing potential conflicts, maintaining a “strategic ambiguity” 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 “inevitable”, and casts any opposition to it as escalatory. As it moves towards being capable of military annexation, Beijing has also been escalating its non-military activity and its statements towards the island.