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China has deployed its maritime law enforcement through the waters of the Diaoyu islands and military drones past outlying Japanese territory as Beijing escalates strains over the Japanese prime minister’s remarks regarding the island of Taiwan.

Rights Enforcement Activities

On Sunday, the Chinese coast guard announced that its vessels conducted a “lawful patrol operation” through the territorial seas of the Diaoyu islands, which are under the control of Japan but also claimed by China.

“China coast guard vessel 1307 formation conducted patrols 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.

Diplomatic Spat

China and Japan have repeatedly faced off around the islands but the latest activity come amid an escalating political dispute after the Japan's leader, Sanae Takaichi, told parliament that if China attack democratically ruled Taiwan it might provoke a military response from Tokyo.

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

Taiwan's Position

Beijing asserts Taiwan as its own territory and plans to incorporate it under what it describes as “unification”. It has not ruled out the use of force. Taiwan’s government and people overwhelmingly reject the idea of Beijing's control – preferring to maintain the current situation without formally announcing independence, but vowing to defend themselves if required.

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

Defense Operations

On the island, the defence ministry reported this weekend 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 past 24 hours.

Maps provided by the ministry showed up to three drones flying between Taiwan and the Japan's territory off its northeastern shoreline, seeming to travel unusually near to the nearby Japanese island. Chinese military transits there are occasional, but uncommon, and Beijing's defense operations in the island's ADIZ generally has been low in the past month.

Late on Saturday, the ministry said Beijing had been conducting another “joint combat patrol” to “harass the airspace and sea around us”. It noted the island 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 the Taiwanese government says is an continuous strategic pressure.

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 Japan by commenting that “those who interfere will face consequences”.

Beijing then called in Japan's diplomat 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 cautioned its citizens against travelling to Japan, prompting Tokyo to urge Beijing to take “appropriate measures”, though it did not elaborate.

Multiple carriers from China said on Saturday that tickets to Japan could be refunded or changed for free.

Adding to the tensions, China’s government on Sunday advised students to rethink education plans in Japan, citing what it characterized as an volatile safety situation.

Although not an outright prohibition, a dramatic reduction in the number of Chinese students could have a detrimental effect on Japanese universities. A historic high of over 336,000 international students were enrolled in Japanese schools last year, according to official data. They included more than 123,000 Chinese students – by far the single biggest group.

Official Commentary

Earlier this weekend, a Chinese state media editorial accused Takaichi of staging a diplomatic maneuver that was “both reckless and fundamentally flawed”.

“A clash between Tokyo and Beijing would not be a small-scale encounter; it would likely draw in other nations, including the US, and could quickly spiral into a major confrontation with unimaginable consequences.”

Strategic Positions

The administration in Taipei 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 Tokyo’s main security ally, the US.

However, Beijing's governing party says the unification of Taiwan with the mainland 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 statements towards Taiwan.