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Beijing has sent its maritime law enforcement through the waters of the Diaoyu islands and unmanned aerial vehicles near outlying Japan's territory as China ramps up strains following the Japan's leader's comments regarding Taiwan.

Patrol Operations

This past Sunday, the Chinese coast guard announced that its vessels conducted a “lawful patrol operation” through the waters of the Senkaku, which are under the control of Japan but also claimed by China.

“Chinese maritime patrol unit 1307 conducted patrols within the territorial waters of the Diaoyu 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 disputed territory but the recent developments occur during an intensifying diplomatic spat after the Japanese prime minister, Sanae Takaichi, told parliament that if Beijing assaults democratically ruled Taiwan it could trigger a armed reaction from Tokyo.

That provoked a furious reaction from Beijing, which has indicated it demands a withdrawal from Takaichi.

Taiwan's Position

Beijing asserts Taiwan as its own territory and plans to incorporate it under what it describes as “reunification”. It has not ruled out the use of force. Taiwan’s government and people categorically refuse the prospect of Chinese rule – choosing to preserve the current situation without formally announcing independence, but vowing to defend themselves 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 Tokyo, which has territory just 110km (68 miles) from the island.

Defense Operations

On the island, the military authorities reported this weekend that it had observed 30 Chinese military aircraft, seven navy ships and one government vessel, which was likely the coast guard, active near the island over the past 24 hours.

Official charts released showed up to multiple UAVs operating near the island and the Japanese islands off its north-east coast, seeming to travel particularly close to Yonaguni. Chinese military transits there are occasional, but uncommon, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been minimal in the past month.

Earlier this weekend, the defense officials said Beijing had been carrying out another “combined military exercise” to “harass the airspace and sea around us”. It added the island had sent its own aircraft and ships to track the developments. Taiwan 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 experiencing increased strain from Beijing since Takaichi made her comments, with Beijing's diplomatic representative in the Japanese city prompting a formal protest from Tokyo by commenting that “those who interfere will face consequences”.

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

Warning for Citizens

On Friday, China advised its people to avoid visiting Japan, leading Japan to request China to take “appropriate measures”, though it provided no details.

Three Chinese airlines said on Saturday that tickets to Japan could be refunded or changed for free.

Adding to the tensions, Beijing's administration on the weekend urged its citizens to “carefully reconsider” studying in Japan, citing what it described as an unstable security environment.

Although not an outright prohibition, a dramatic reduction in the number of Chinese students could have a detrimental effect on academic institutions in Japan. 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.

Media Response

Late on Saturday, a official press commentary accused Takaichi of staging a political stunt that was “both reckless and fundamentally flawed”.

“A clash between Tokyo and Beijing would not be a small-scale encounter; it would probably involve other powers, including the US, and could quickly spiral into a large-scale conflict with unimaginable consequences.”

Strategic Positions

The government of Taiwan says only its people can decide its future. Japanese leaders have traditionally refrained from publicly mentioning Taiwan when addressing potential conflicts, maintaining a “deliberate vagueness” also preferred by Japan's primary defense partner, the US.

Nevertheless, China’s ruling Communist party says the incorporation of the island with the People’s Republic of China is “unavoidable”, and portrays dissent as provocative. As it advances toward potential armed takeover, Beijing has also been increasing its political operations and its statements towards the island.