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Beijing has deployed its maritime law enforcement through the waters of the Diaoyu islands and unmanned aerial vehicles past outlying Japan's territory as Beijing escalates strains over the Japanese prime minister’s comments regarding the island of Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard announced that its ships carried out a “lawful patrol operation” 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 performed surveillance within the territorial waters of the Senkaku islands. This was a legitimate rights enforcement activity undertaken by the Chinese maritime authorities to protect its sovereign claims,” officials declared.

Bilateral Tensions

China and Japan have consistently clashed around the disputed territory but the latest activity occur during an intensifying diplomatic spat after the Japan's leader, Sanae Takaichi, told parliament that if China attack the self-governing island of Taiwan it might provoke a military response from Japan.

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

Island's Stance

Beijing asserts Taiwan as its sovereign land and intends to annex it under what it describes as “unification”. It has not ruled out the military option. The island's administration and citizens overwhelmingly reject the idea of Beijing's control – choosing to preserve the status quo without explicitly declaring themselves independent, but vowing to defend themselves if required.

An military assault by Beijing would threaten to spiral into a regional or global conflict, potentially involving the US and other partner nations including Japan, which has land just 68 miles from the island.

Defense Operations

On the island, the military authorities reported this weekend that it had observed three dozen PLA planes, multiple naval vessels and one “official” ship, which was probably the maritime patrol, operating around the territory over the previous day.

Official charts released showed up to three drones operating near the island and the Japanese islands off its northeastern shoreline, appearing to go unusually near to Yonaguni. PLA movements there are occasional, but uncommon, and Chinese military activity in the island's ADIZ generally has been low in recent weeks.

Earlier this weekend, the ministry said China had been conducting another “combined military exercise” to “harass the airspace and sea around us”. It added the island had dispatched military assets 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

Tokyo has been facing mounting pressure from China since Takaichi made her remarks, with Beijing's diplomatic representative in Osaka triggering an official complaint from Japan by commenting that “those who interfere will face consequences”.

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

Warning for Citizens

On Friday, Beijing 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, Beijing's administration on the weekend urged its citizens to “carefully reconsider” studying in Japan, citing what it characterized as an volatile safety situation.

Although not an outright prohibition, a significant decrease in the population of learners from China could have a detrimental effect on Japanese universities. A record 336,708 foreign nationals were studying in Japan last year, according to official data. They featured over 123,000 learners from China – 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 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 rapidly escalate to a major confrontation with severe repercussions.”

Policy Standpoints

The administration in Taipei says the island's residents alone determine their destiny. Japanese leaders have previously avoided discussing the island openly when addressing potential conflicts, maintaining a “strategic ambiguity” also favoured by Tokyo’s main security ally, the US.

However, Beijing's governing party says the incorporation of the island with the mainland China is “inevitable”, and portrays dissent as provocative. As it advances toward potential armed takeover, Beijing has also been escalating its non-military activity and its statements towards Taiwan.