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Beijing has deployed its coast guard through the maritime area of the Diaoyu islands and military drones near outlying Japan's territory as Beijing ramps up strains over the Japan's leader's remarks regarding Taiwan.

Patrol Operations

On Sunday, the China's maritime patrol stated that its vessels conducted a “lawful patrol operation” through the waters of the Diaoyu islands, which are administered by Tokyo but also asserted as territory by China.

“Chinese maritime patrol unit 1307 performed surveillance within the territorial waters of the Senkaku 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 repeatedly faced off around the islands but the latest activity come amid an escalating political dispute after the Japanese prime minister, Sanae Takaichi, addressed lawmakers that if Beijing assaults democratically ruled Taiwan it might provoke a military response from Tokyo.

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

Taiwan's Position

Beijing asserts the island as its own territory and intends to annex it under what it terms “reunification”. It has left open the military option. The island's administration and citizens overwhelmingly reject the prospect of Chinese rule – preferring to maintain the current situation without formally announcing independence, but pledging to protect their sovereignty if required.

An military assault by China would risk escalating into a international confrontation, potentially involving the US and other partner nations including Japan, which has land just 68 miles from the island.

Military Activity

On the island, the military authorities reported this weekend that it had detected three dozen PLA planes, seven navy ships and one government vessel, which was likely the maritime patrol, active near the territory over the previous day.

Maps provided by the ministry showed up to multiple UAVs operating near Taiwan and the Japanese islands off its northeastern shoreline, seeming to travel unusually near to the nearby Japanese island. PLA movements there are not rare, but uncommon, and Chinese military activity in the island's ADIZ generally has been low in recent weeks.

Earlier this weekend, the ministry said Beijing had been conducting another “joint combat patrol” to “harass the airspace and sea around us”. 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 Taipei says is an ongoing military pressure campaign.

Political Strain

Japan has been experiencing increased strain from China since the Japanese official made her remarks, with Beijing's diplomatic representative in Osaka prompting a formal protest 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 declared that any Japanese intervention would be certain to collapse.

Warning for Citizens

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

Three Chinese airlines said on Saturday that tickets to Japan could be refunded or changed for free.

Adding to the tensions, China’s government on the weekend urged its citizens to “carefully reconsider” studying in Japan, citing what it characterized as an volatile safety situation.

Although not an outright prohibition, a significant decrease in the population of learners from China could have a negative impact on Japanese universities. A historic high of over 336,000 international students were studying in Japan last year, according to official data. They featured over 123,000 learners from China – by far the largest demographic.

Official Commentary

Earlier this weekend, a official press commentary charged the Japanese official with performing a diplomatic maneuver 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 United States, and could rapidly escalate to a major confrontation with unimaginable consequences.”

Policy Standpoints

The government of Taiwan says the island's residents alone determine their destiny. Japanese leaders have previously avoided discussing the island openly when discussing such scenarios, maintaining a “strategic ambiguity” also favoured by Tokyo’s main security ally, the US.

However, Beijing's governing party says the unification of Taiwan with the People’s Republic of China is “unavoidable”, and portrays dissent as provocative. As it moves towards being capable of military annexation, China has also been increasing its political operations and its rhetoric towards the island.