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Beijing has sent its maritime law enforcement through the waters of the Senkaku islands and military drones past outlying Japan's territory as Beijing escalates tensions following the Japan's leader's remarks regarding Taiwan.

Rights Enforcement Activities

On Sunday, the China's maritime patrol announced that its ships carried out a “lawful patrol operation” through the territorial seas of the Senkaku, which are administered by Tokyo but also claimed 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 uphold its rights and interests,” the statement said.

Bilateral Tensions

China and Japan have repeatedly faced off around the disputed territory but the recent developments come amid an escalating political dispute after the Japan's leader, the Japanese official, told parliament that if Beijing assaults the self-governing island of Taiwan it could trigger a military response from Tokyo.

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

Island's Stance

Beijing asserts Taiwan as its own territory and intends to annex it under what it describes as “reunification”. It has not ruled out the military option. Taiwan’s government and people categorically refuse the idea of Beijing's control – choosing to preserve the current situation without explicitly declaring themselves independent, but pledging to protect their sovereignty if necessary.

An attack or invasion by China would risk escalating into a international confrontation, potentially involving the US and other partner nations including Japan, which has territory just 68 miles from Taiwan.

Military Activity

On the island, the defence ministry said on Sunday morning that it had detected 30 Chinese military aircraft, multiple naval vessels and one “official” ship, which was probably the coast guard, active near the island over the past 24 hours.

Maps provided by the ministry showed up to multiple UAVs flying between the island and the Japanese islands off its northeastern shoreline, appearing to go particularly close to the nearby Japanese island. Chinese military transits there are not rare, but infrequent, and Beijing's defense operations in the island's ADIZ generally has been low in the past month.

Earlier this weekend, the defense officials said China had been carrying out another “joint combat patrol” to “test our defensive capabilities”. It added the island had dispatched military assets to monitor the situation. Taiwan reports such Chinese patrols a couple of times a month as part of what Taipei says is an ongoing military pressure campaign.

Diplomatic Pressure

Tokyo has been facing mounting pressure from Beijing since Takaichi made her comments, with China’s consul general in the Japanese city prompting a formal protest from Japan 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.

Travel and Education Advisory

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

Multiple carriers from China said on Saturday that tickets to Japan could be refunded or changed for free.

In another escalation, China’s government on the weekend advised students to rethink education plans in Japan, citing what it characterized as an unstable security environment.

Although not an outright prohibition, a significant decrease in the population of learners from China could have a negative impact 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 included more than 123,000 Chinese students – by far the largest demographic.

Official Commentary

Earlier this weekend, a official press commentary charged the Japanese official with performing a diplomatic maneuver that was “not just dangerously provocative but fundamentally perverse”.

“A clash between Tokyo and Beijing would not be a limited skirmish; it would probably involve other nations, including the United States, and could rapidly escalate to a major confrontation with unimaginable consequences.”

Strategic Positions

The administration in Taipei says the island's residents alone determine their destiny. Officials in Tokyo have traditionally refrained from discussing the island openly when discussing such scenarios, maintaining a “strategic ambiguity” also favoured by Japan's primary defense partner, the United States.

However, Beijing's governing party says the unification of Taiwan with the People’s Republic of China is “unavoidable”, and portrays dissent as provocative. As it advances toward potential armed takeover, Beijing has also been increasing its political operations and its rhetoric towards Taiwan.