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Beijing has sent its maritime law enforcement through the maritime area of the Diaoyu islands and unmanned aerial vehicles past outlying Japan's territory as Beijing ramps up tensions following the Japanese prime minister’s comments regarding Taiwan.

Rights Enforcement Activities

This past Sunday, the China's maritime patrol stated that its ships conducted a “lawful patrol operation” through the waters of the Diaoyu islands, which are administered by Tokyo but also asserted as territory by China.

“China coast guard vessel 1307 formation performed surveillance within the maritime jurisdiction 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 repeatedly faced off around the islands but the recent developments come amid an intensifying diplomatic spat after the Japanese prime minister, Sanae Takaichi, addressed lawmakers that if China attack democratically ruled Taiwan it could trigger a military response from Tokyo.

That sparked an angry response from China, which has signalled it expects a withdrawal from Takaichi.

Taiwan's Position

China claims the island as its sovereign land and plans to incorporate it under what it terms “unification”. It has not ruled out the military option. Taiwan’s government and people overwhelmingly reject the prospect of Chinese rule – preferring to maintain the current situation without explicitly declaring themselves independent, but vowing to defend themselves if required.

An attack or invasion by China would threaten to spiral into a international confrontation, possibly drawing in the US and other partner nations including Tokyo, 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, seven navy ships and one government vessel, which was probably the coast guard, operating around the territory over the past 24 hours.

Maps provided by the ministry showed up to multiple UAVs operating near the island and the Japanese islands off its north-east coast, seeming to travel unusually near to the nearby Japanese island. 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 ministry said Beijing had been carrying out another “joint combat patrol” to “test our defensive capabilities”. It noted 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 Taipei says is an continuous strategic pressure.

Diplomatic Pressure

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

China then called in Japan's diplomat for the first occasion since 2023, and Beijing's military authorities declared that any Tokyo's involvement would be certain to collapse.

Travel and Education Advisory

Late last week, China cautioned its citizens against travelling to Japan, leading Japan to request China to take “appropriate measures”, though it did not elaborate.

Three Chinese airlines announced this weekend that flights to Tokyo could be refunded or changed for free.

Adding to the tensions, China’s government on Sunday advised students to rethink education plans in Japan, citing what it described as an unstable security environment.

Although not an outright prohibition, a dramatic reduction in the population of learners from China could have a negative impact on Japanese universities. A record 336,708 foreign nationals 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.

Official Commentary

Late on Saturday, a Chinese state media editorial charged the Japanese official with performing 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 quickly spiral into a major confrontation with severe repercussions.”

Policy Standpoints

The government of Taiwan says the island's residents alone determine their destiny. Japanese leaders have traditionally refrained from publicly mentioning Taiwan when discussing such scenarios, maintaining a “strategic ambiguity” also favoured by Tokyo’s main security ally, the United States.

Nevertheless, Beijing's governing party says the unification of Taiwan with the mainland China is “inevitable”, and casts any opposition to it as escalatory. As it advances toward potential armed takeover, Beijing has also been escalating its non-military activity and its rhetoric towards Taiwan.