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China has sent its coast guard into the maritime area of the Diaoyu islands and unmanned aerial vehicles past outlying Japanese territory as Beijing escalates tensions following the Japanese prime minister’s comments regarding Taiwan.

Rights Enforcement Activities

This past Sunday, the Chinese coast guard announced that its vessels carried out a “lawful patrol operation” through the territorial seas of the Senkaku, which are administered by 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 China coast guard to uphold its rights and interests,” the statement said.

Diplomatic Spat

China and Japan have repeatedly faced off around the islands but the recent developments come amid an intensifying diplomatic spat after the Japan's leader, the Japanese official, addressed lawmakers that if China attack democratically ruled Taiwan it could trigger a military response from Japan.

That sparked an angry response from Beijing, which has signalled it expects a retraction from the Japanese official.

Island's Stance

China claims the island as its sovereign land and intends to annex it under what it terms “unification”. It has left open the use of force. Taiwan’s government and citizens overwhelmingly reject the prospect of Chinese rule – preferring to maintain the current situation without explicitly declaring themselves independent, but vowing to defend themselves if necessary.

An attack or invasion by China would threaten to spiral into a international confrontation, possibly drawing in the US and other allies including Tokyo, which has territory just 68 miles from the island.

Military Activity

In Taiwan, the defence ministry said on Sunday morning that it had detected 30 Chinese military aircraft, seven navy ships and one “official” ship, which was probably the coast guard, active near the territory over the previous day.

Maps provided by the ministry showed up to three drones operating near Taiwan and the Japanese islands off its north-east coast, appearing to go particularly close to Yonaguni. 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 the past month.

Earlier this weekend, the ministry said China had been conducting another “joint combat patrol” to “harass the airspace and sea around us”. It noted Taiwan had dispatched military assets to monitor the situation. The island reports such Chinese patrols a couple of times a month as part of what Taipei says is an ongoing military pressure campaign.

Diplomatic Pressure

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

Beijing 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

Late last week, Beijing advised its people to avoid visiting Japan, prompting Tokyo to urge Beijing to take “appropriate measures”, though it did not elaborate.

Three Chinese airlines announced this weekend that flights to Tokyo could be refunded or changed for free.

Adding to the tensions, Beijing's administration on Sunday 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 detrimental effect on academic institutions in Japan. A record 336,708 foreign nationals were studying in Japan last year, according to official data. They featured over 123,000 learners from China – by far the largest demographic.

Media Response

Earlier this weekend, a official press commentary accused Takaichi of staging 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 powers, including the United States, and could quickly spiral into a large-scale conflict with severe repercussions.”

Policy Standpoints

The government of Taiwan says the island's residents alone determine their destiny. Japanese leaders have previously avoided publicly mentioning Taiwan when addressing potential conflicts, maintaining a “deliberate vagueness” also preferred by Tokyo’s main security ally, the United States.

However, China’s ruling Communist party says the unification of Taiwan with the People’s Republic of China is “inevitable”, 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 the island.