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China has sent its coast guard into the maritime area of the Senkaku islands and military drones past remote Japan's territory as Beijing escalates strains over the Japan's leader's remarks regarding Taiwan.

Patrol Operations

This past Sunday, the Chinese coast guard announced that its ships carried out a “lawful patrol operation” through the waters of the Diaoyu islands, which are administered by Japan but also claimed by Beijing.

“Chinese maritime patrol unit 1307 conducted patrols within the maritime jurisdiction of the Diaoyu islands. This was a legitimate rights enforcement activity conducted by the China coast guard to protect its sovereign claims,” officials declared.

Bilateral Tensions

China and Japan have consistently clashed around the disputed territory but the recent developments occur during an escalating political dispute after the Japan's leader, Sanae Takaichi, told parliament that if Beijing assaults democratically ruled Taiwan it might provoke a military response from Japan.

That sparked an angry response from China, which has indicated it demands a retraction from the Japanese official.

Taiwan's Position

China claims Taiwan as its own territory 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 current situation without formally announcing independence, but vowing to defend themselves if necessary.

An attack or invasion by China would risk escalating into a regional or global conflict, potentially involving the United States and other allies including Japan, which has territory just 68 miles from the island.

Military Activity

In Taiwan, the defence ministry said on Sunday morning that it had detected three dozen PLA planes, seven navy ships and one government vessel, which was probably the coast guard, active near the territory over the previous day.

Official charts released showed up to three drones flying between the island and the Japan's territory off its northeastern shoreline, appearing to go unusually near to the nearby Japanese island. Chinese military transits there are not rare, but uncommon, and Chinese military activity in the island's ADIZ generally has been low in the past month.

Late on Saturday, the defense officials said Beijing had been carrying out 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. The island documents these operations a few times monthly as part of what the Taiwanese government says is an ongoing military pressure campaign.

Political Strain

Tokyo has been facing mounting pressure from China since the Japanese official made her remarks, with China’s consul general in the Japanese city triggering an official complaint from Japan by stating that “the dirty head that sticks itself out must be cut off”.

Beijing then summoned the Japanese ambassador for the first occasion since 2023, and China’s defence ministry declared that any Japanese intervention would be certain to collapse.

Travel and Education Advisory

On Friday, China advised its people to avoid visiting Japan, prompting Tokyo to urge Beijing 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.

In another escalation, Beijing's administration on the weekend urged its citizens to “carefully reconsider” studying in Japan, citing what it characterized as an volatile safety situation.

While the advice does not amount to a ban, a dramatic reduction in the population of learners from China could have a detrimental effect on academic institutions in Japan. 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.

Media Response

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

“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 quickly spiral into a large-scale conflict with unimaginable consequences.”

Policy Standpoints

The government of Taiwan says the island's residents alone determine their destiny. Japanese leaders have previously avoided discussing the island openly when discussing such scenarios, maintaining a “deliberate vagueness” 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 casts any opposition to it as escalatory. As it moves towards being capable of military annexation, China has also been escalating its non-military activity and its rhetoric towards Taiwan.