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Beijing has deployed its coast guard through the maritime area of the Diaoyu islands and military drones near remote Japanese territory as China ramps up tensions following the Japanese prime minister’s comments regarding the island of Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard stated that its ships carried out a “rights enforcement patrol” through the waters of the Diaoyu islands, which are administered by Tokyo but also asserted as territory by China.

“China coast guard vessel 1307 formation performed surveillance within the territorial waters of the Diaoyu islands. This was a lawful patrol operation conducted by the Chinese maritime authorities 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 Japanese prime minister, the Japanese official, told parliament that if China attack the self-governing island of Taiwan it could trigger 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 the island as its sovereign land and plans to incorporate it under what it describes as “unification”. It has not ruled out the military option. The island's administration and people overwhelmingly reject the idea of Beijing's control – choosing to preserve the current situation without explicitly declaring themselves independent, 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 US and other partner nations including Tokyo, which has territory just 110km (68 miles) from the island.

Military Activity

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 probably the coast guard, operating around the territory over the previous day.

Maps provided by the ministry showed up to multiple UAVs operating near the island and the Japan's territory off its northeastern shoreline, seeming to travel unusually near to the nearby Japanese island. PLA movements there are not rare, but uncommon, and Beijing's defense operations in the island's ADIZ generally has been low in recent weeks.

Earlier this weekend, the ministry said China had been carrying out another “combined military exercise” to “harass the airspace and sea around us”. It added the island had dispatched military assets 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.

Diplomatic Pressure

Tokyo has been experiencing increased strain from Beijing since Takaichi made her comments, with Beijing's diplomatic representative in Osaka prompting a formal protest from Tokyo by stating that “those who interfere will face consequences”.

China then summoned the Japanese ambassador for the first occasion since 2023, and Beijing's military authorities stated that any Japanese intervention would be certain to collapse.

Warning for Citizens

On Friday, Beijing cautioned its citizens against travelling to Japan, prompting Tokyo to urge Beijing to take “suitable actions”, though it provided no details.

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

In another escalation, Beijing's administration on the weekend advised students to rethink education plans in Japan, citing what it described 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 detrimental effect on Japanese universities. A historic high of over 336,000 international students were studying in Japan last year, according to official data. They included more than 123,000 Chinese students – by far the largest demographic.

Official Commentary

Earlier this weekend, a Chinese state media editorial charged the Japanese official with performing a political stunt that was “both reckless and fundamentally flawed”.

“A conflict between Japan and China would not be a limited skirmish; it would likely draw in other powers, including the United States, and could rapidly escalate to a major confrontation with severe repercussions.”

Strategic Positions

The government of Taiwan says the island's residents alone determine their destiny. Japanese leaders have traditionally refrained from publicly mentioning Taiwan when addressing potential conflicts, maintaining a “strategic ambiguity” also preferred by Japan's primary defense partner, the US.

Nevertheless, China’s ruling Communist party says the incorporation of the island with the mainland 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 rhetoric towards the island.