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China has deployed its coast guard into the maritime area of the Diaoyu islands and military drones near remote Japanese territory as China escalates strains following the Japanese prime minister’s comments regarding Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard stated that its ships conducted a “lawful patrol operation” through the territorial seas of the Diaoyu islands, which are under the control of Tokyo but also claimed by China.

“China coast guard vessel 1307 formation performed surveillance within the territorial waters of the Senkaku islands. This was a legitimate rights enforcement activity conducted by the Chinese maritime authorities to protect its sovereign claims,” the statement said.

Bilateral Tensions

China and Japan have repeatedly faced off around the islands but the recent developments occur during an intensifying diplomatic spat after the Japan's leader, the Japanese official, told parliament that if China attack democratically ruled Taiwan it could trigger a armed reaction from Tokyo.

That sparked an angry response 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 left open the military option. Taiwan’s government and citizens 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 necessary.

An military assault by China would risk escalating into a regional or global conflict, potentially involving the US and other partner nations including Tokyo, which has land just 68 miles from Taiwan.

Defense Operations

On the island, the military authorities said on Sunday morning that it had detected 30 Chinese military aircraft, multiple naval vessels and one “official” ship, which was probably the maritime patrol, operating around the territory over the previous day.

Maps provided by the ministry showed up to three drones flying between Taiwan and the Japanese islands off its north-east coast, appearing to go particularly close to Yonaguni. PLA movements there are not rare, but uncommon, and Beijing's defense operations in the island's ADIZ generally has been low in recent weeks.

Late on Saturday, the defense officials said China had been conducting another “combined military exercise” to “test our defensive capabilities”. It added Taiwan had sent its own aircraft and ships to track the developments. The island reports such Chinese patrols a few times monthly as part of what Taipei says is an continuous strategic pressure.

Diplomatic Pressure

Tokyo has been experiencing increased strain from Beijing since Takaichi made her remarks, with Beijing's diplomatic representative 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 summoned the Japanese ambassador for the first occasion since 2023, and Beijing's military authorities stated that any Japanese intervention would be certain to collapse.

Warning for Citizens

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

Multiple carriers from China said on Saturday that flights to Tokyo could be refunded or changed for free.

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

Although not an outright prohibition, 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 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 accused Takaichi of staging a diplomatic maneuver that was “not just dangerously provocative but fundamentally perverse”.

“A conflict between Japan and China would not be a limited skirmish; it would probably involve other nations, including the United States, and could rapidly escalate to a large-scale conflict 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 Tokyo’s main security ally, the United States.

However, China’s ruling Communist party says the incorporation of the island with the mainland China is “unavoidable”, and casts any opposition to it as escalatory. As it advances toward potential armed takeover, China has also been increasing its political operations and its statements towards the island.