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China has deployed its coast guard through the maritime area of the Senkaku islands and unmanned aerial vehicles near outlying Japanese territory as Beijing ramps up strains following the Japanese prime minister’s remarks regarding the island of Taiwan.

Patrol Operations

This past Sunday, the Chinese coast guard announced that its ships conducted a “lawful patrol operation” through the territorial seas of the Diaoyu islands, which are under the control of Japan but also asserted as territory by Beijing.

“Chinese maritime patrol unit 1307 performed surveillance within the territorial waters of the Senkaku islands. This was a lawful patrol operation undertaken by the Chinese maritime authorities to protect its sovereign claims,” officials declared.

Diplomatic Spat

Beijing and Tokyo have repeatedly faced off around the islands but the recent developments come amid an intensifying diplomatic spat after the Japanese prime minister, Sanae Takaichi, told parliament that if Beijing assaults the self-governing island of Taiwan it could trigger a armed reaction from Tokyo.

That provoked a furious reaction from China, which has indicated it demands a withdrawal from the Japanese official.

Island's Stance

China claims the island as its own territory and intends to annex it under what it terms “unification”. It has not ruled out the use of force. Taiwan’s government and people categorically refuse the idea of Beijing's control – choosing to preserve the current situation without formally announcing independence, but pledging to protect their sovereignty if required.

An attack or invasion by Beijing would risk escalating into a international confrontation, potentially involving the United States 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 detected three dozen PLA planes, multiple naval vessels and one “official” ship, which was likely the coast guard, active near the island over the past 24 hours.

Maps provided by the ministry showed up to three drones operating near Taiwan and the Japanese islands off its north-east coast, appearing to go particularly close to Yonaguni. Chinese military transits there are occasional, but infrequent, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been minimal in recent weeks.

Late on Saturday, the defense officials said Beijing had been conducting another “combined military exercise” to “test our defensive capabilities”. It added the island had sent its own aircraft and ships to monitor the situation. The island documents these operations a few times monthly as part of what the Taiwanese government says is an continuous strategic pressure.

Political Strain

Japan has been facing mounting pressure from China since Takaichi made her comments, with China’s consul general in Osaka prompting a formal protest from Japan by stating that “those who interfere will face consequences”.

Beijing then summoned the Japanese ambassador for the first occasion since 2023, and Beijing's military authorities stated that any Tokyo's involvement would be doomed to fail.

Travel and Education Advisory

Late last week, China advised its people to avoid visiting Japan, leading Japan to request China to take “suitable actions”, though it did not elaborate.

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

In another escalation, Beijing's administration on Sunday 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 significant decrease 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.

Official Commentary

Late on Saturday, a official press commentary charged the Japanese official with performing a political stunt that was “not just dangerously provocative but fundamentally perverse”.

“A clash between Tokyo and Beijing would not be a limited skirmish; it would likely draw in other nations, including the US, and could rapidly escalate to a major confrontation with severe repercussions.”

Strategic Positions

The administration in Taipei says only its people can decide its future. Japanese leaders have previously avoided discussing the island openly when addressing potential conflicts, maintaining a “deliberate vagueness” also favoured by Japan's primary defense partner, the US.

Nevertheless, Beijing's governing party says the incorporation of the island with the People’s Republic of 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.