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China has deployed its coast guard through the maritime area of the Senkaku islands and military drones near outlying Japanese territory as Beijing ramps up strains over the Japanese prime minister’s comments regarding the island of Taiwan.

Patrol Operations

On Sunday, the Chinese coast guard announced that its vessels carried out a “rights enforcement patrol” through the territorial seas of the Senkaku, which are administered by Japan but also asserted as territory by Beijing.

“China coast guard vessel 1307 formation performed surveillance within the maritime jurisdiction of the Diaoyu islands. This was a lawful patrol operation undertaken 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 latest activity occur during an escalating political dispute after the Japanese prime minister, Sanae Takaichi, addressed lawmakers that if Beijing assaults the self-governing island of Taiwan it could trigger a military response from Tokyo.

That provoked a furious reaction from China, which has indicated it demands a retraction from the Japanese official.

Island's Stance

China claims Taiwan as its sovereign land and plans to incorporate it under what it terms “reunification”. It has not ruled out the military option. Taiwan’s government and people overwhelmingly reject the idea of Beijing's control – preferring to maintain the status quo without explicitly declaring themselves independent, but pledging to protect their sovereignty if required.

An attack or invasion by Beijing would threaten to spiral into a regional or global conflict, potentially involving the United States and other partner nations including Tokyo, which has land just 110km (68 miles) from the island.

Military Activity

On the island, the military authorities said on Sunday morning that it had detected three dozen PLA planes, multiple naval vessels and one government vessel, which was likely the coast guard, operating around the island over the previous day.

Official charts released showed up to multiple UAVs operating near Taiwan and the Japan's territory off its north-east coast, seeming to travel particularly close to the nearby Japanese island. Chinese military transits there are occasional, but infrequent, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been low in recent weeks.

Earlier this weekend, the defense officials said Beijing had been carrying out another “combined military exercise” to “test our defensive capabilities”. It noted 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 the Taiwanese government says is an ongoing military pressure campaign.

Diplomatic Pressure

Tokyo has been facing mounting pressure from Beijing since the Japanese official made her remarks, with Beijing's diplomatic representative in the Japanese city prompting a formal protest from Japan 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 Tokyo's involvement would be doomed to fail.

Travel and Education Advisory

On Friday, China advised its people to avoid visiting Japan, leading Japan to request China to take “suitable actions”, though it did not elaborate.

Multiple carriers from China announced this weekend that flights to Tokyo could be refunded or changed for free.

Adding to the tensions, Beijing's administration on Sunday advised students to rethink education plans in Japan, citing what it described as an volatile safety situation.

Although not an outright prohibition, a significant decrease in the number of Chinese students could have a negative impact on academic institutions in Japan. 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.

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 clash between Tokyo and Beijing would not be a limited skirmish; it would probably involve other powers, including the US, and could quickly spiral into a large-scale conflict with severe repercussions.”

Policy Standpoints

The government of Taiwan says only its people can decide its future. Officials in Tokyo have previously avoided publicly mentioning Taiwan when addressing potential conflicts, maintaining a “strategic ambiguity” also preferred by Tokyo’s main security ally, the US.

Nevertheless, China’s ruling Communist party says the unification of Taiwan with the mainland China is “unavoidable”, and portrays dissent as provocative. As it moves towards being capable of military annexation, Beijing has also been escalating its non-military activity and its statements towards Taiwan.