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Beijing has sent its maritime law enforcement into the maritime area of the Diaoyu islands and military drones past remote Japanese territory as Beijing escalates strains over the Japan's leader's remarks regarding the island of Taiwan.

Rights Enforcement Activities

On Sunday, the China's maritime patrol announced that its vessels conducted a “rights enforcement patrol” through the territorial seas of the Senkaku, which are administered by Tokyo but also claimed by Beijing.

“China coast guard vessel 1307 formation performed surveillance within the maritime jurisdiction of the Senkaku islands. This was a legitimate rights enforcement activity undertaken by the China coast guard to protect its sovereign claims,” officials declared.

Bilateral Tensions

China and Japan have consistently clashed around the islands but the latest activity occur during an escalating political dispute after the Japanese prime minister, the Japanese official, told parliament that if Beijing assaults democratically ruled Taiwan it could trigger a military response from Japan.

That sparked an angry response from Beijing, which has indicated it demands a retraction from Takaichi.

Island's Stance

Beijing asserts the island as its own territory and plans to incorporate it under what it describes as “reunification”. It has left open the military option. Taiwan’s government and people categorically refuse 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 threaten to spiral into a regional or global conflict, potentially involving the United States and other allies including Japan, which has territory just 110km (68 miles) from the island.

Military Activity

In Taiwan, 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 maritime patrol, active near the island over the previous day.

Official charts released showed up to multiple UAVs flying between Taiwan and the Japanese islands off its north-east coast, appearing to go unusually near to the nearby Japanese island. 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.

Late on Saturday, the ministry said Beijing had been carrying out another “joint combat patrol” to “test our defensive capabilities”. It noted Taiwan had dispatched military assets to monitor the situation. The island documents these operations a couple of times a month as part of what Taipei says is an ongoing military pressure campaign.

Diplomatic Pressure

Tokyo has been experiencing increased strain from China since Takaichi made her remarks, with China’s consul general in the Japanese city triggering an official complaint from Tokyo by commenting 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 stated that any Tokyo's involvement would be certain to collapse.

Warning for Citizens

On Friday, Beijing cautioned its citizens against travelling to Japan, leading Japan to request China to take “suitable actions”, though it did not elaborate.

Three Chinese airlines said on Saturday that flights to Tokyo could be cancelled without penalty.

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 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 historic high of over 336,000 international students were studying in Japan last year, according to official data. They featured over 123,000 learners from China – by far the largest demographic.

Media Response

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

“A conflict between Japan and China would not be a limited skirmish; it would probably involve other powers, including the United States, and could quickly spiral into a large-scale conflict with severe repercussions.”

Policy Standpoints

The government of Taiwan says only its people can decide its future. Japanese leaders have traditionally refrained from publicly mentioning Taiwan when discussing such scenarios, maintaining a “deliberate vagueness” also preferred by Tokyo’s main security ally, the US.

Nevertheless, China’s ruling Communist party says the unification of Taiwan with the People’s Republic of China is “inevitable”, and casts any opposition to it as escalatory. As it moves towards being capable of military annexation, Beijing has also been escalating its non-military activity and its statements towards Taiwan.