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Beijing has sent its coast guard into the maritime area of the Senkaku islands and military drones past remote Japan's territory as Beijing escalates strains over the Japanese prime minister’s comments regarding the island of Taiwan.

Patrol Operations

On Sunday, the China's maritime patrol stated that its ships carried out a “rights enforcement patrol” through the territorial seas of the Diaoyu islands, which are administered by Japan but also asserted as territory by Beijing.

“China coast guard vessel 1307 formation conducted patrols within the maritime jurisdiction of the Senkaku islands. This was a legitimate rights enforcement activity conducted by the Chinese maritime authorities to uphold its rights and interests,” officials declared.

Diplomatic Spat

China and Japan have repeatedly faced off around the disputed territory but the recent developments occur during an intensifying diplomatic spat after the Japan's leader, Sanae Takaichi, addressed lawmakers 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.

Island's Stance

China claims the island as its own territory and plans to incorporate it under what it describes as “unification”. It has left open the military option. Taiwan’s government and citizens overwhelmingly reject the prospect of Chinese rule – preferring to maintain the current situation without formally announcing independence, but vowing to defend themselves if required.

An military assault by Beijing would threaten to spiral into a regional or global conflict, potentially involving the United States and other allies including Japan, 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 30 Chinese military aircraft, multiple naval vessels and one government vessel, which was likely the maritime patrol, operating around the territory over the previous day.

Maps provided by the ministry showed up to multiple UAVs flying between the island and the Japanese islands off its north-east coast, appearing to go unusually near to Yonaguni. PLA movements there are occasional, but uncommon, and Chinese military activity in Taiwan’s air defence identification zone generally has been low in the past month.

Late on Saturday, the ministry said Beijing had been carrying out another “combined military exercise” to “harass the airspace and sea around us”. It noted Taiwan had sent its own aircraft and ships to monitor the situation. The island documents these operations a few times monthly as part of what Taipei says is an continuous strategic pressure.

Political Strain

Tokyo has been experiencing increased strain from China since Takaichi made her comments, with Beijing's diplomatic representative 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 declared that any Japanese intervention would be certain to collapse.

Warning for Citizens

Late last week, Beijing 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.

Adding to the tensions, Beijing's administration on Sunday advised students to rethink education plans 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 negative impact on Japanese universities. A record 336,708 foreign nationals were studying in Japan last year, according to education statistics. They featured over 123,000 learners from China – by far the single biggest group.

Official Commentary

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 US, and could quickly spiral into a large-scale conflict with severe repercussions.”

Strategic Positions

The government of Taiwan says the island's residents alone determine their destiny. Officials in Tokyo have previously avoided publicly mentioning Taiwan when addressing potential conflicts, maintaining a “deliberate vagueness” also preferred by Japan's primary defense partner, the US.

However, China’s ruling Communist party says the incorporation of the island with the mainland China is “inevitable”, 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 the island.