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China has deployed its coast guard into the waters of the Senkaku islands and unmanned aerial vehicles near outlying Japanese territory as Beijing ramps up strains following the Japan's leader's remarks regarding Taiwan.

Patrol Operations

This past Sunday, the China's maritime patrol stated that its vessels conducted a “rights enforcement patrol” through the territorial seas of the Diaoyu islands, which are administered by Tokyo but also claimed by China.

“Chinese maritime patrol unit 1307 conducted patrols within the territorial waters of the Senkaku islands. This was a lawful patrol operation conducted by the China coast guard to protect its sovereign claims,” the statement said.

Bilateral Tensions

China and Japan have repeatedly faced off around the disputed territory but the recent developments come amid an intensifying diplomatic spat after the Japan's leader, the Japanese official, addressed lawmakers that if China attack democratically ruled Taiwan it might provoke a armed reaction from Japan.

That sparked an angry response from China, which has signalled it expects a retraction from Takaichi.

Island's Stance

Beijing asserts the island as its own territory and plans to incorporate it under what it describes as “unification”. It has left open the military option. Taiwan’s government and people categorically refuse the prospect of Chinese rule – preferring to maintain the status quo without explicitly declaring themselves independent, but vowing to defend themselves if necessary.

An military assault by China would threaten to spiral into a international confrontation, potentially involving the United States and other allies including Tokyo, which has land just 110km (68 miles) from the island.

Military Activity

In Taiwan, the defence ministry reported this weekend that it had observed 30 Chinese military aircraft, seven navy ships and one “official” ship, which was probably the maritime patrol, operating around the island over the past 24 hours.

Official charts released showed up to three drones operating near Taiwan and the Japan's territory off its north-east coast, appearing to go unusually near to the nearby Japanese island. Chinese military transits there are occasional, but uncommon, and Chinese military activity in the island's ADIZ generally has been minimal in recent weeks.

Earlier this weekend, the defense officials said China had been conducting another “joint combat patrol” to “test our defensive capabilities”. It noted Taiwan had dispatched military assets to monitor the situation. The island reports such Chinese patrols a couple of times a month as part of what Taipei says is an ongoing military pressure campaign.

Political Strain

Japan has been experiencing increased strain from Beijing since the Japanese official made her remarks, 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”.

China 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

Late last week, China advised its people to avoid visiting Japan, prompting Tokyo to urge Beijing to take “appropriate measures”, though it provided no details.

Three Chinese airlines announced this weekend that flights to Tokyo could be cancelled without penalty.

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

While the advice does not amount to a ban, a dramatic reduction in the number of Chinese students 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 official data. 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 political stunt that was “not just dangerously provocative but fundamentally perverse”.

“A conflict between Japan and China would not be a small-scale encounter; it would probably involve other nations, including the US, and could rapidly escalate to a large-scale conflict with severe repercussions.”

Strategic Positions

The administration in Taipei says the island's residents alone determine their destiny. Japanese leaders have traditionally refrained from discussing the island openly when addressing potential conflicts, maintaining a “deliberate vagueness” also favoured by Japan's primary defense partner, the United States.

However, Beijing's governing party says the incorporation of the island with the People’s Republic of 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 Taiwan.