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China has sent its maritime law enforcement through the waters of the Diaoyu islands and military drones near outlying Japanese territory as China ramps up tensions over the Japanese prime minister’s remarks regarding Taiwan.

Patrol Operations

This past Sunday, the China's maritime patrol announced that its vessels conducted a “rights enforcement patrol” through the territorial seas of the Senkaku, which are administered by Tokyo but also asserted as territory by China.

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

Bilateral Tensions

Beijing and Tokyo have repeatedly faced off around the disputed territory but the latest activity come amid an intensifying diplomatic spat after the Japan's leader, the Japanese official, addressed lawmakers that if Beijing assaults the self-governing island of Taiwan it might provoke a military response from Japan.

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

Island's Stance

China claims the island as its own territory and intends to annex it under what it terms “reunification”. It has left open the military option. The island's administration and citizens categorically refuse the idea of Beijing's control – choosing to preserve the status quo without formally announcing independence, but vowing to defend themselves if required.

An attack or invasion by China would risk escalating into a regional or global conflict, possibly drawing in the United States and other partner nations including Japan, which has land just 68 miles from the island.

Defense Operations

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

Official charts released showed up to multiple UAVs flying between the island and the Japan's territory off its northeastern shoreline, appearing to go particularly close to Yonaguni. PLA movements there are not rare, but uncommon, and Chinese military activity in the island's ADIZ generally has been minimal in recent weeks.

Late on Saturday, the defense officials said Beijing had been conducting another “joint combat patrol” to “harass the airspace and sea around us”. It noted the island 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 ongoing military pressure campaign.

Diplomatic Pressure

Japan has been experiencing increased strain from China since Takaichi made her comments, with Beijing's diplomatic representative in the Japanese city triggering an official complaint from Japan by stating that “those who interfere will face consequences”.

Beijing then called in Japan's diplomat for the first time in more than two years, and Beijing's military authorities stated that any Japanese intervention would be doomed to fail.

Travel and Education Advisory

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

Multiple carriers from China said on Saturday that tickets to Japan could be cancelled without penalty.

In another escalation, Beijing's administration on the weekend advised students to rethink education plans in Japan, citing what it described as an unstable security environment.

While the advice does not amount to a ban, a dramatic reduction in the population of learners from China could have a negative impact on academic institutions in Japan. 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 single biggest group.

Official Commentary

Earlier this weekend, a official press commentary charged the Japanese official with performing a political stunt that was “both reckless and fundamentally flawed”.

“A clash between Tokyo and Beijing would not be a limited skirmish; it would likely draw in other powers, including the US, and could rapidly escalate to a major confrontation with unimaginable consequences.”

Policy Standpoints

The administration in Taipei says only its people can decide its future. Officials in Tokyo have previously avoided discussing the island openly when discussing such scenarios, maintaining a “strategic ambiguity” also preferred by Japan's primary defense partner, the US.

However, China’s ruling Communist party says the unification of Taiwan 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 escalating its non-military activity and its rhetoric towards the island.