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China has deployed its coast guard into the waters of the Senkaku islands and unmanned aerial vehicles past remote Japanese territory as China escalates strains over the Japan's leader's remarks regarding Taiwan.

Rights Enforcement Activities

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

“China coast guard vessel 1307 formation conducted patrols within the territorial waters 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

Beijing and Tokyo have consistently clashed around the islands but the latest activity occur during an intensifying diplomatic spat after the Japan's leader, Sanae Takaichi, told parliament that if Beijing assaults the self-governing island of Taiwan it could trigger a military response from Tokyo.

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

Island's Stance

Beijing asserts Taiwan as its sovereign land and intends to annex it under what it describes as “unification”. It has not ruled out the military option. The island's administration and people overwhelmingly reject the prospect of Chinese rule – preferring to maintain the status quo without explicitly declaring themselves independent, but vowing to defend themselves if necessary.

An military assault by China would risk escalating into a international confrontation, possibly drawing in the United States and other partner nations including Tokyo, which has land just 110km (68 miles) from Taiwan.

Military Activity

On the island, the defence ministry reported this weekend that it had observed three dozen PLA planes, seven navy ships and one government vessel, which was likely the coast guard, active near the island over the past 24 hours.

Maps provided by the ministry showed up to multiple UAVs flying between Taiwan and the Japanese islands off its north-east coast, appearing to go unusually near to Yonaguni. PLA movements there are not rare, but infrequent, and Beijing's defense operations in the island's ADIZ generally has been minimal in the past month.

Late on Saturday, the ministry said China had been conducting 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 couple of times a month as part of what the Taiwanese government says is an continuous strategic pressure.

Diplomatic Pressure

Tokyo has been facing mounting pressure from Beijing since the Japanese official made her remarks, with Beijing's diplomatic representative in Osaka prompting a formal protest from Japan by commenting that “those who interfere will face consequences”.

Beijing then summoned the Japanese ambassador for the first occasion since 2023, and China’s defence ministry declared that any Japanese intervention would be doomed to fail.

Warning for Citizens

Late last week, China cautioned its citizens against travelling to Japan, prompting Tokyo to urge Beijing to take “suitable actions”, though it provided no details.

Multiple carriers from China announced this weekend that flights to Tokyo could be cancelled without penalty.

In another escalation, China’s government on the weekend advised students to rethink education plans in Japan, citing what it described as an volatile safety situation.

Although not an outright prohibition, a dramatic reduction in the population of learners from China could have a negative impact on academic institutions in Japan. A historic high of over 336,000 international students were enrolled in Japanese schools last year, according to education statistics. They featured over 123,000 learners from China – by far the largest demographic.

Media Response

Earlier this weekend, a official press commentary charged the Japanese official with performing 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 nations, including the US, and could quickly spiral into a major confrontation with severe repercussions.”

Strategic Positions

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

However, Beijing's governing party says the incorporation of the island with the mainland China is “inevitable”, and casts any opposition to it as escalatory. As it advances toward potential armed takeover, Beijing has also been escalating its non-military activity and its rhetoric towards Taiwan.