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Beijing has deployed its coast guard into the waters of the Diaoyu islands and military drones near outlying Japan's territory as Beijing escalates tensions following the Japan's leader's comments regarding Taiwan.

Patrol Operations

On Sunday, the Chinese coast guard stated that its ships conducted a “rights enforcement patrol” through the territorial seas of the Senkaku, which are under the control of Japan but also asserted as territory by China.

“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 protect its sovereign claims,” the statement said.

Bilateral Tensions

Beijing and Tokyo have consistently clashed around the disputed territory but the latest activity come amid an intensifying diplomatic spat after the Japanese prime minister, the Japanese official, addressed lawmakers that if Beijing assaults the self-governing island of Taiwan it might provoke a armed reaction from Japan.

That sparked an angry response from China, which has indicated it demands a withdrawal from Takaichi.

Island's Stance

Beijing asserts Taiwan as its own territory and intends to annex it under what it describes as “reunification”. It has left open the military option. The island's administration and citizens overwhelmingly reject the idea of Beijing's control – preferring to maintain the current situation without formally announcing independence, but pledging to protect their sovereignty if necessary.

An military assault by China would risk escalating into a regional or global conflict, possibly drawing in the US and other partner nations including Tokyo, which has territory just 110km (68 miles) from Taiwan.

Military Activity

On the island, the military authorities said on Sunday morning that it had detected three dozen PLA planes, multiple naval vessels and one government vessel, which was probably the coast guard, active near the island over the past 24 hours.

Official charts released showed up to multiple UAVs operating near Taiwan and the Japan's territory off its north-east coast, seeming to travel particularly close to the nearby Japanese island. Chinese military transits there are occasional, but infrequent, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been minimal in the past month.

Earlier this weekend, the ministry said Beijing had been conducting another “joint combat patrol” to “harass the airspace and sea around us”. It added Taiwan had sent its own aircraft and ships to monitor the situation. Taiwan reports such Chinese patrols a few times monthly as part of what the Taiwanese government says is an continuous strategic pressure.

Diplomatic Pressure

Tokyo has been facing mounting pressure from Beijing since the Japanese official made her remarks, with China’s consul general in the Japanese city triggering an official complaint from Tokyo by stating 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 stated that any Tokyo's involvement would be doomed to fail.

Warning for Citizens

On Friday, Beijing 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 tickets to Japan could be refunded or changed for free.

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 significant decrease 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 included more than 123,000 Chinese students – by far the largest demographic.

Media Response

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 limited skirmish; it would probably involve other nations, including the US, and could rapidly escalate to a large-scale conflict with unimaginable consequences.”

Policy Standpoints

The administration in Taipei says the island's residents alone determine their destiny. Officials in Tokyo have previously avoided discussing the island openly when discussing such scenarios, maintaining a “strategic ambiguity” also preferred by Tokyo’s main security ally, the United States.

However, Beijing's governing party says the unification of Taiwan with the mainland China is “unavoidable”, and casts any opposition to it as escalatory. As it moves towards being capable of military annexation, Beijing has also been increasing its political operations and its rhetoric towards Taiwan.