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Beijing has deployed its maritime law enforcement into the waters of the Diaoyu islands and unmanned aerial vehicles past remote Japanese territory as Beijing ramps up tensions over the Japanese prime minister’s remarks regarding the island of Taiwan.

Patrol Operations

On Sunday, the Chinese coast guard announced that its vessels conducted a “lawful patrol operation” through the territorial seas of the Senkaku, which are administered by Tokyo but also claimed by China.

“China coast guard vessel 1307 formation conducted patrols within the maritime jurisdiction of the Senkaku islands. This was a lawful patrol operation conducted by the China coast guard to protect its sovereign claims,” officials declared.

Bilateral Tensions

China and Japan have repeatedly faced off around the islands but the latest activity come amid an intensifying diplomatic spat after the Japan's leader, Sanae Takaichi, addressed lawmakers that if China attack democratically ruled Taiwan it might provoke a armed reaction from Tokyo.

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

Taiwan's Position

Beijing asserts Taiwan as its sovereign land and intends to annex it under what it describes as “reunification”. It has not ruled out the use of force. The island's administration and people overwhelmingly reject the idea of Beijing's control – preferring to maintain the status quo without formally announcing independence, but pledging to protect their sovereignty if required.

An attack or invasion by China would risk escalating into a international confrontation, possibly drawing in the US and other partner nations including Japan, which has territory just 110km (68 miles) from Taiwan.

Military Activity

On the island, the defence ministry said on Sunday morning that it had observed 30 Chinese military aircraft, multiple naval vessels and one “official” ship, which was probably the coast guard, operating around the island over the past 24 hours.

Official charts released showed up to multiple UAVs operating near Taiwan and the Japan's territory off its north-east coast, appearing to go particularly close to Yonaguni. PLA movements there are occasional, but infrequent, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been minimal in the past month.

Earlier this weekend, the ministry said Beijing 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 ongoing military pressure campaign.

Political Strain

Japan has been experiencing increased strain from Beijing since Takaichi made her comments, with Beijing's diplomatic representative in Osaka triggering an official complaint from Japan by stating that “the dirty head that sticks itself out must be cut off”.

Beijing then called in Japan's diplomat for the first occasion since 2023, and Beijing's military authorities stated that any Japanese intervention would be doomed to fail.

Travel and Education Advisory

On Friday, Beijing cautioned its citizens against travelling to Japan, leading Japan to request China to take “suitable actions”, though it provided no details.

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

Adding to the tensions, Beijing's administration 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 significant decrease in the population of learners from China could have a negative impact on Japanese universities. A record 336,708 foreign nationals were studying in Japan last year, according to education statistics. They included more than 123,000 Chinese students – by far the largest demographic.

Official Commentary

Earlier this weekend, a Chinese state media editorial charged the Japanese official with performing a diplomatic maneuver that was “both reckless and fundamentally flawed”.

“A conflict between Japan and China would not be a limited skirmish; it would likely draw in other nations, including the United States, and could rapidly escalate to a major confrontation with severe repercussions.”

Strategic Positions

The government of Taiwan 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 preferred by Tokyo’s main security ally, the US.

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