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China has sent its coast guard into the waters of the Diaoyu islands and unmanned aerial vehicles near outlying Japan's territory as Beijing escalates tensions over the Japanese prime minister’s comments regarding the island of Taiwan.

Patrol Operations

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

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

Bilateral Tensions

China and Japan have consistently clashed around the disputed territory but the latest activity occur during an intensifying diplomatic spat after the Japan's leader, Sanae Takaichi, told parliament that if Beijing assaults democratically ruled Taiwan it might provoke a armed reaction from Tokyo.

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

Island's Stance

China claims Taiwan as its sovereign land and plans to incorporate it under what it describes as “unification”. It has not ruled out the use of force. The island's administration and people overwhelmingly reject the idea of Beijing's control – choosing to preserve the current situation without formally announcing independence, but vowing to defend themselves if required.

An military assault by China would risk escalating into a regional or global conflict, possibly drawing in the US and other allies including Japan, which has land just 110km (68 miles) from Taiwan.

Defense Operations

In Taiwan, 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 maritime patrol, operating around the territory over the past 24 hours.

Official charts released showed up to multiple UAVs flying between the island and the Japanese islands off its north-east coast, appearing to go particularly close to the nearby Japanese island. Chinese military transits there are not rare, but uncommon, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been low in recent weeks.

Earlier this weekend, the ministry said China had been carrying out another “joint combat patrol” to “test our defensive capabilities”. It noted Taiwan had dispatched military assets to monitor the situation. The island documents these operations a couple of times a month as part of what the Taiwanese government says is an continuous strategic pressure.

Political Strain

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

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 doomed to fail.

Warning for Citizens

Late last week, Beijing advised its people to avoid visiting Japan, prompting Tokyo to urge Beijing to take “appropriate measures”, though it provided no details.

Three Chinese airlines said on Saturday that tickets to Japan could be cancelled without penalty.

Adding to the tensions, China’s government on the weekend advised students to rethink education plans 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 record 336,708 foreign nationals were studying in Japan last year, according to official data. They included more than 123,000 Chinese students – by far the single biggest group.

Media Response

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 limited skirmish; it would probably involve other nations, including the United States, and could rapidly escalate to a large-scale conflict with severe repercussions.”

Strategic Positions

The government of Taiwan says only its people can decide its future. Officials in Tokyo have previously avoided discussing the island openly when discussing such scenarios, maintaining a “strategic ambiguity” also preferred by Tokyo’s main security ally, the United States.

Nevertheless, China’s ruling Communist party says the incorporation of the island with the mainland China is “unavoidable”, and portrays dissent as provocative. As it advances toward potential armed takeover, Beijing has also been escalating its non-military activity and its rhetoric towards Taiwan.