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China has sent its coast guard through the waters of the Senkaku islands and unmanned aerial vehicles near remote Japan's territory as Beijing escalates strains following the Japan's leader's remarks regarding the island of Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard announced that its vessels carried out a “lawful patrol operation” through the waters of the Diaoyu islands, which are under the control of Tokyo but also asserted as territory by China.

“Chinese maritime patrol unit 1307 conducted patrols within the territorial waters of the Senkaku islands. This was a lawful patrol operation undertaken by the China coast guard to protect its sovereign claims,” the statement said.

Diplomatic Spat

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 China attack democratically ruled Taiwan it might provoke a armed reaction from Japan.

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

Taiwan's Position

China claims Taiwan as its sovereign land and intends to annex it under what it describes as “unification”. It has left open the military option. Taiwan’s government and people categorically refuse the prospect of Chinese rule – preferring to maintain the status quo without explicitly declaring themselves independent, but vowing to defend themselves if required.

An attack or invasion by Beijing would risk escalating into a regional or global conflict, possibly drawing in the US and other allies including Tokyo, which has territory just 68 miles from the island.

Defense Operations

In Taiwan, the defence ministry reported this weekend that it had observed three dozen PLA planes, multiple naval vessels and one “official” ship, which was probably the maritime patrol, operating around the island over the past 24 hours.

Maps provided by the ministry showed up to multiple UAVs operating near Taiwan and the Japanese islands off its north-east coast, seeming to travel unusually near to Yonaguni. Chinese military transits there are not rare, but uncommon, and Beijing's defense operations in Taiwan’s air defence identification zone generally has been minimal in recent weeks.

Late on Saturday, the ministry said Beijing had been carrying out another “combined military exercise” to “test our defensive capabilities”. It added Taiwan had sent its own aircraft and ships to monitor the situation. The island reports such Chinese patrols a couple of times a month as part of what Taipei says is an continuous strategic pressure.

Political Strain

Tokyo has been facing mounting pressure from Beijing since Takaichi made her comments, with China’s consul general in Osaka 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 Beijing's military authorities stated that any Tokyo's involvement would be certain to collapse.

Travel and Education Advisory

On Friday, China advised its people to avoid visiting Japan, prompting Tokyo to urge Beijing to take “suitable actions”, though it did not elaborate.

Three Chinese airlines 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 unstable security environment.

While the advice does not amount to a ban, a dramatic reduction in the population of learners from China could have a detrimental effect on Japanese universities. A record 336,708 foreign nationals were studying in Japan last year, according to education statistics. They included more than 123,000 Chinese students – by far the largest demographic.

Official Commentary

Late on Saturday, a Chinese state media editorial accused Takaichi of staging a political stunt that was “not just dangerously provocative but fundamentally perverse”.

“A conflict between Japan and China would not be a limited skirmish; it would likely draw in other powers, including the United States, and could quickly spiral into a large-scale conflict with unimaginable consequences.”

Policy Standpoints

The government of Taiwan says only its people can decide its future. Japanese leaders have traditionally refrained from publicly mentioning Taiwan when discussing such scenarios, maintaining a “strategic ambiguity” also favoured by Tokyo’s main security ally, the US.

Nevertheless, China’s ruling Communist party says the incorporation of the island with the People’s Republic of 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 rhetoric towards Taiwan.