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China has deployed its coast guard through the maritime area of the Diaoyu islands and unmanned aerial vehicles near outlying Japanese territory as Beijing escalates tensions following the Japanese prime minister’s comments regarding Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard announced that its vessels conducted a “lawful patrol operation” through the waters of the Senkaku, which are administered by Japan but also asserted as territory by China.

“Chinese maritime patrol unit 1307 performed surveillance within the territorial waters of the Senkaku islands. This was a lawful patrol operation conducted by the Chinese maritime authorities to uphold its rights and interests,” officials declared.

Bilateral Tensions

Beijing and Tokyo have repeatedly faced off around the islands but the latest activity occur during an escalating political dispute after the Japanese prime minister, the Japanese official, addressed lawmakers that if Beijing assaults the self-governing island of Taiwan it could trigger a armed reaction from Japan.

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

Island's Stance

China claims the island as its own territory and plans to incorporate it under what it describes as “reunification”. It has left open the use of force. Taiwan’s government and citizens categorically refuse the prospect of Chinese rule – preferring to maintain the current situation without formally announcing independence, but vowing to defend themselves if required.

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

Defense Operations

In Taiwan, the defence ministry said on Sunday morning that it had detected 30 Chinese military aircraft, multiple naval vessels and one government vessel, which was probably the maritime patrol, operating around the territory over the previous day.

Maps provided by the ministry showed up to three drones flying between the island and the Japanese islands off its northeastern shoreline, seeming to travel unusually near to the nearby Japanese island. Chinese military transits there are occasional, but uncommon, and Chinese military activity in the island's ADIZ generally has been minimal in the past month.

Late on Saturday, the defense officials said China had been conducting another “joint combat patrol” to “test our defensive capabilities”. It noted the island had dispatched military assets to monitor the situation. The island reports such Chinese patrols a few times monthly as part of what the Taiwanese government says is an ongoing military pressure campaign.

Diplomatic Pressure

Japan has been facing mounting pressure from Beijing since the Japanese official made her remarks, with China’s consul general in the Japanese city prompting a formal protest from Japan by commenting that “those who interfere will face consequences”.

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

Warning for Citizens

On Friday, China cautioned its citizens against travelling to 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 Sunday 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 dramatic reduction 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 largest demographic.

Official Commentary

Earlier this weekend, 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 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 administration in Taipei says the island's residents alone determine their destiny. Officials in Tokyo have previously avoided publicly mentioning Taiwan when addressing potential conflicts, maintaining a “deliberate vagueness” also favoured by Japan's primary defense partner, the US.

However, 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 increasing its political operations and its statements towards the island.