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Beijing has deployed its maritime law enforcement into the maritime area of the Diaoyu islands and military drones past remote Japanese territory as China ramps up strains over the Japanese prime minister’s remarks regarding Taiwan.

Rights Enforcement Activities

On Sunday, the China's maritime patrol stated that its vessels conducted a “lawful patrol operation” through the territorial seas of the Diaoyu islands, which are administered by Tokyo but also claimed by Beijing.

“China coast guard vessel 1307 formation performed surveillance within the territorial waters of the Diaoyu islands. This was a lawful patrol operation undertaken by the China coast guard to uphold its rights and interests,” officials declared.

Bilateral Tensions

Beijing and Tokyo have repeatedly faced off around the disputed territory but the latest activity occur during an intensifying diplomatic spat after the Japan's leader, the Japanese official, told parliament that if Beijing assaults the self-governing island of Taiwan it might provoke a armed reaction from Japan.

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

Taiwan's Position

Beijing asserts Taiwan as its sovereign land and plans to incorporate it under what it describes as “reunification”. It has left open the military option. Taiwan’s government and citizens categorically refuse the idea of Beijing's control – choosing to preserve the status quo without formally announcing independence, but vowing to defend themselves if necessary.

An attack or invasion by China would threaten to spiral into a international confrontation, possibly drawing in the US and other allies including Japan, which has territory just 110km (68 miles) from the island.

Military Activity

In Taiwan, the defence ministry said on Sunday morning that it had detected 30 Chinese military aircraft, seven navy ships and one government vessel, which was likely the coast guard, active near the island over the previous day.

Official charts released showed up to three drones flying between the island and the Japanese islands off its northeastern shoreline, appearing to go particularly close to Yonaguni. PLA movements there are occasional, but uncommon, and Chinese military activity in the island's ADIZ generally has been minimal in the past month.

Earlier this weekend, the defense officials said Beijing had been conducting another “combined military exercise” to “harass the airspace and sea around us”. It added Taiwan had sent its own aircraft and ships to track the developments. Taiwan documents these operations a few times monthly as part of what the Taiwanese government says is an continuous strategic pressure.

Political Strain

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

China then called in Japan's diplomat for the first time in more than two years, and Beijing's military authorities stated that any Japanese intervention would be certain to collapse.

Travel and Education Advisory

On Friday, China cautioned its citizens against travelling to Japan, prompting Tokyo to urge Beijing to take “appropriate measures”, though it did not elaborate.

Multiple carriers from China announced this weekend that tickets to Japan could be cancelled without penalty.

In another escalation, Beijing's administration on the weekend advised students to rethink education plans in Japan, citing what it characterized 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 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 single biggest group.

Media Response

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

“A clash between Tokyo and Beijing would not be a small-scale encounter; it would likely draw in other nations, including the United States, and could rapidly escalate to a large-scale conflict with severe repercussions.”

Strategic Positions

The government of Taiwan says the island's residents alone determine their destiny. Japanese leaders have previously avoided publicly mentioning Taiwan when discussing such scenarios, 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 People’s Republic of China is “inevitable”, and casts any opposition to it as escalatory. As it advances toward potential armed takeover, Beijing has also been increasing its political operations and its rhetoric towards Taiwan.