China Sends Coast Guard Vessels to Diaoyu Islands Amid Tensions with Tokyo

China has sent its maritime law enforcement into the waters of the Senkaku islands and unmanned aerial vehicles past remote Japan's territory as China escalates tensions following the Japan's leader's comments regarding the island of Taiwan.

Patrol Operations

On Sunday, the China's maritime patrol announced that its vessels carried out a “rights enforcement patrol” through the territorial seas of the Diaoyu islands, which are administered by Japan but also asserted as territory by China.

“China coast guard vessel 1307 formation conducted patrols within the maritime jurisdiction of the Diaoyu islands. This was a lawful patrol operation undertaken by the Chinese maritime authorities to uphold its rights and interests,” officials declared.

Bilateral Tensions

Beijing and Tokyo have consistently clashed around the disputed territory but the latest activity come amid an escalating political dispute after the Japan's leader, Sanae Takaichi, addressed lawmakers that if China attack democratically ruled Taiwan it might provoke a military response from Japan.

That sparked an angry response from Beijing, which has indicated it demands a retraction from Takaichi.

Taiwan's Position

Beijing asserts the island as its sovereign land and intends to annex it under what it terms “unification”. It has left open the use of force. The island's administration and citizens categorically refuse the prospect of Chinese rule – choosing to preserve the status quo without explicitly declaring themselves independent, but pledging to protect their sovereignty if necessary.

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

Military Activity

On the island, the military authorities reported this weekend that it had detected three dozen PLA planes, seven navy ships and one government vessel, which was likely the maritime patrol, operating around the island over the previous day.

Maps provided by the ministry showed up to multiple UAVs flying between the island and the Japan's territory off its northeastern shoreline, seeming to travel unusually near to Yonaguni. PLA movements there are occasional, but uncommon, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been low in the past month.

Earlier this weekend, the defense officials said Beijing had been conducting another “joint combat patrol” to “test our defensive capabilities”. It noted Taiwan 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 the Taiwanese government says is an continuous strategic pressure.

Political Strain

Tokyo has been facing mounting pressure from China since the Japanese official made her comments, with China’s consul general in the Japanese city triggering an official complaint from Japan by commenting that “the dirty head that sticks itself out must be cut off”.

China then summoned the Japanese ambassador for the first occasion since 2023, and China’s defence ministry declared that any Japanese intervention would be certain to collapse.

Travel and Education Advisory

On Friday, Beijing advised its people to avoid visiting Japan, prompting Tokyo to urge Beijing to take “suitable actions”, though it did not elaborate.

Multiple carriers from China said on Saturday that flights to Tokyo could be cancelled without penalty.

Adding to the tensions, Beijing's administration on the weekend 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 dramatic reduction in the population of learners from China could have a detrimental effect on academic institutions in Japan. A historic high of over 336,000 international students were enrolled in Japanese schools last year, according to official data. They included more than 123,000 Chinese students – by far the single biggest group.

Media Response

Earlier this weekend, a official press commentary accused Takaichi of staging a diplomatic maneuver that was “not just dangerously provocative but fundamentally perverse”.

“A clash between Tokyo and Beijing would not be a small-scale encounter; it would likely draw in other powers, including the United States, and could quickly spiral into a major confrontation with unimaginable consequences.”

Strategic Positions

The government of Taiwan says the island's residents alone determine their destiny. Officials in Tokyo have previously avoided publicly mentioning Taiwan when addressing potential conflicts, maintaining a “deliberate vagueness” also preferred by Japan's primary defense partner, the US.

However, Beijing's governing party says the unification of Taiwan 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 rhetoric towards Taiwan.