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

Rights Enforcement Activities

This past Sunday, the Chinese coast guard announced that its ships carried out a “rights enforcement patrol” through the waters of the Senkaku, which are under the control of Japan but also asserted as territory by China.

“China coast guard vessel 1307 formation conducted patrols within the territorial waters of the Senkaku islands. This was a legitimate rights enforcement activity conducted by the Chinese maritime authorities to uphold its rights and interests,” the statement said.

Bilateral Tensions

Beijing and Tokyo have repeatedly faced off around the islands but the latest activity come amid an intensifying diplomatic spat after the Japan's leader, the Japanese official, told parliament that if Beijing assaults the self-governing island of Taiwan it might provoke a military response from Japan.

That provoked a furious reaction from Beijing, which has signalled it expects a retraction from the Japanese official.

Island's Stance

Beijing asserts the island 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 status quo without explicitly declaring themselves independent, but pledging to protect their sovereignty if required.

An attack or invasion by China would risk escalating into a regional or global conflict, possibly drawing in the United States and other partner nations including Tokyo, which has territory just 68 miles from Taiwan.

Military Activity

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

Official charts released showed up to multiple UAVs flying between Taiwan and the Japan's territory off its northeastern shoreline, seeming to travel particularly close to the nearby Japanese island. Chinese military transits there are not rare, but infrequent, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been low in recent weeks.

Late on Saturday, the ministry said China had been conducting another “joint combat patrol” to “harass the airspace and sea around us”. It noted the island had dispatched military assets to track the developments. The island reports such Chinese patrols a few times monthly as part of what the Taiwanese government says is an continuous strategic pressure.

Diplomatic Pressure

Japan has been experiencing increased strain from Beijing since the Japanese official made her remarks, with Beijing's diplomatic representative in the Japanese city triggering an official complaint from Japan by stating that “those who interfere will face consequences”.

China then summoned the Japanese ambassador for the first occasion since 2023, and China’s defence ministry declared that any Tokyo's involvement would be doomed to fail.

Travel and Education Advisory

Late last week, Beijing cautioned its citizens against travelling to Japan, prompting Tokyo to urge Beijing to take “appropriate measures”, though it provided no details.

Multiple carriers from China said on Saturday that flights to Tokyo could be cancelled without penalty.

Adding to the tensions, China’s government on Sunday 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 number of Chinese students 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.

Official Commentary

Late on Saturday, a official press commentary charged the Japanese official with performing a diplomatic maneuver 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 nations, including the US, and could quickly spiral into a major confrontation with unimaginable consequences.”

Policy Standpoints

The administration in Taipei says the island's residents alone determine their destiny. Officials in Tokyo have traditionally refrained from publicly mentioning Taiwan when addressing potential conflicts, maintaining a “strategic ambiguity” also favoured by Tokyo’s main security ally, the US.

However, 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 statements towards Taiwan.