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China has deployed its maritime law enforcement into the maritime area of the Diaoyu islands and military drones near remote Japan's territory as China escalates strains over the Japanese prime minister’s remarks regarding Taiwan.

Rights Enforcement Activities

On Sunday, the China's maritime patrol stated that its vessels carried out a “rights enforcement patrol” through the waters of the Diaoyu islands, which are administered by Japan but also claimed by China.

“China coast guard vessel 1307 formation performed surveillance within the territorial waters of the Diaoyu islands. This was a legitimate rights enforcement activity undertaken by the China coast guard to uphold its rights and interests,” officials declared.

Bilateral Tensions

China and Japan have consistently clashed around the islands but the recent developments occur during an intensifying diplomatic spat after the Japanese prime minister, the Japanese official, told parliament that if Beijing assaults democratically ruled Taiwan it might provoke a armed reaction from Japan.

That provoked a furious reaction from China, which has signalled it expects a withdrawal from Takaichi.

Island's Stance

Beijing asserts the island as its sovereign land and intends to annex it under what it describes as “unification”. It has not ruled out the use of force. The island's administration and people overwhelmingly reject the prospect of Chinese rule – choosing to preserve the current situation without explicitly declaring themselves independent, but pledging to protect their sovereignty if required.

An military assault by China would risk escalating into a international confrontation, potentially involving the United States and other allies including Japan, which has territory just 110km (68 miles) from Taiwan.

Military Activity

In Taiwan, the defence ministry reported this weekend that it had detected 30 Chinese military aircraft, multiple naval vessels and one government vessel, which was probably the maritime patrol, active near the territory over the past 24 hours.

Official charts released showed up to three drones flying between Taiwan and the Japan's territory off its northeastern shoreline, appearing to go unusually near to Yonaguni. PLA movements there are occasional, but infrequent, and Chinese military activity in Taiwan’s air defence identification zone generally has been low in recent weeks.

Late on Saturday, the defense officials said Beijing had been conducting another “joint combat patrol” to “test our defensive capabilities”. It noted the island had sent its own aircraft and ships to monitor the situation. The island documents these operations a couple of times a month as part of what the Taiwanese government says is an continuous strategic pressure.

Political Strain

Japan 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 “those who interfere will face consequences”.

Beijing then summoned the Japanese ambassador for the first occasion since 2023, and China’s defence ministry stated that any Japanese intervention would be doomed to fail.

Warning for Citizens

On Friday, China cautioned its citizens against travelling to 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 cancelled without penalty.

In another escalation, China’s government on Sunday urged its citizens to “carefully reconsider” studying in Japan, citing what it described as an unstable security environment.

Although not an outright prohibition, a dramatic reduction in the number of Chinese students could have a negative impact 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 single biggest group.

Media Response

Late on Saturday, a official press commentary accused Takaichi of staging a political stunt that was “both reckless and fundamentally flawed”.

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

Strategic Positions

The government of Taiwan says only its people can decide its future. Japanese leaders have previously avoided discussing the island openly when addressing potential conflicts, maintaining a “strategic ambiguity” also preferred 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 “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 statements towards Taiwan.