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China has sent its maritime law enforcement through the maritime area of the Diaoyu islands and unmanned aerial vehicles near outlying Japanese territory as China ramps up tensions over the Japan's leader's remarks regarding Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard stated that its vessels carried out a “rights enforcement patrol” through the waters of the Senkaku, which are under the control of Japan but also claimed by China.

“China coast guard vessel 1307 formation performed surveillance within the maritime jurisdiction of the Diaoyu islands. This was a legitimate rights enforcement activity conducted by the Chinese maritime authorities to uphold its rights and interests,” officials declared.

Diplomatic Spat

China and Japan have repeatedly faced off around the disputed territory but the recent developments occur during an escalating political dispute after the Japanese prime minister, Sanae Takaichi, told parliament that if China attack democratically ruled Taiwan it could trigger a military response from Japan.

That sparked an angry response from Beijing, which has indicated it demands a withdrawal from the Japanese official.

Taiwan's Position

Beijing asserts the island as its sovereign land and plans to incorporate it under what it describes as “reunification”. It has left open the military option. The island's administration and citizens overwhelmingly reject the idea of Beijing's control – preferring to maintain the current situation without explicitly declaring themselves independent, but pledging to protect their sovereignty if necessary.

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 68 miles from Taiwan.

Defense Operations

In Taiwan, the military authorities said on Sunday morning that it had detected 30 Chinese military aircraft, multiple naval vessels and one government vessel, which was probably the coast guard, operating around the island over the previous day.

Maps provided by the ministry showed up to multiple UAVs flying between Taiwan and the Japanese islands off its northeastern shoreline, appearing to go particularly close to the nearby Japanese island. PLA movements there are occasional, but infrequent, and Chinese military activity in the island's ADIZ generally has been low in recent weeks.

Earlier this weekend, the defense officials said Beijing had been carrying out another “joint combat patrol” to “test our defensive capabilities”. It added the island had sent its own aircraft and ships to monitor the situation. Taiwan documents these operations a few times monthly as part of what the Taiwanese government says is an ongoing military pressure campaign.

Diplomatic Pressure

Tokyo has been experiencing increased strain from Beijing since Takaichi made her comments, with China’s consul general in the Japanese city triggering an official complaint from Japan by stating that “those who interfere will face consequences”.

China then called in Japan's diplomat for the first occasion since 2023, and China’s defence ministry declared that any Tokyo's involvement would be certain to collapse.

Travel and Education Advisory

Late last week, Beijing advised its people to avoid visiting Japan, leading Japan to request China 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, Beijing's administration on the weekend urged its citizens to “carefully reconsider” studying in Japan, citing what it characterized as an volatile safety situation.

While the advice does not amount to a ban, a dramatic reduction in the number of Chinese students could have a negative impact on Japanese universities. A historic high of over 336,000 international students 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

Earlier this weekend, a Chinese state media editorial accused Takaichi of staging a diplomatic maneuver that was “both reckless and fundamentally flawed”.

“A conflict between Japan and China would not be a small-scale encounter; it would likely draw in other nations, including the US, and could quickly spiral into a major confrontation with unimaginable consequences.”

Policy Standpoints

The government of Taiwan says only its people can decide its future. Officials in Tokyo have traditionally refrained from discussing the island openly when addressing potential conflicts, maintaining a “deliberate vagueness” also favoured by Tokyo’s main security ally, the United States.

Nevertheless, China’s ruling Communist party says the unification of Taiwan with the People’s Republic of China is “unavoidable”, and casts any opposition to it as escalatory. As it advances toward potential armed takeover, China has also been escalating its non-military activity and its statements towards the island.