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Beijing has sent its coast guard through the maritime area of the Senkaku islands and military drones near remote Japanese territory as China escalates tensions over the Japan's leader's comments regarding the island of Taiwan.

Patrol Operations

This past Sunday, the China's maritime patrol announced that its ships carried out a “lawful patrol operation” through the waters of the Senkaku, which are under the control of Japan but also claimed by Beijing.

“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 protect its sovereign claims,” the statement said.

Diplomatic Spat

China and Japan have consistently clashed around the disputed territory but the latest activity occur during an escalating political dispute after the Japanese prime minister, Sanae Takaichi, addressed lawmakers that if China attack the self-governing island of Taiwan it could trigger a military response from Tokyo.

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

Island's Stance

China claims the island as its own territory and plans to incorporate it under what it describes as “reunification”. It has left open the use of force. The island's administration and people overwhelmingly reject the idea of Beijing's control – preferring to maintain the current situation without explicitly declaring themselves independent, but pledging to protect their sovereignty if necessary.

An attack or invasion by Beijing would risk escalating into a international confrontation, possibly drawing in the US and other allies including Japan, which has territory just 110km (68 miles) from Taiwan.

Defense Operations

In Taiwan, the military authorities reported this weekend that it had detected three dozen PLA planes, multiple naval vessels 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 the island and the Japan's territory off its north-east coast, seeming to travel unusually near to Yonaguni. Chinese military transits there are not rare, 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 China had been conducting another “joint combat patrol” to “test our defensive capabilities”. It noted Taiwan had sent its own aircraft and ships to monitor the situation. Taiwan reports such Chinese patrols a few times monthly as part of what the Taiwanese government says is an ongoing military pressure campaign.

Political Strain

Tokyo has been experiencing increased strain from Beijing since the Japanese official made her comments, with China’s consul general in Osaka prompting a formal protest from Japan by stating that “those who interfere will face consequences”.

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

Travel and Education Advisory

On Friday, Beijing cautioned its citizens against travelling to Japan, leading Japan to request China to take “suitable actions”, though it provided no details.

Three Chinese airlines announced this weekend that tickets to Japan could be cancelled without penalty.

In another escalation, Beijing's administration on the weekend urged its citizens to “carefully reconsider” studying in Japan, citing what it described 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 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 single biggest group.

Official Commentary

Late on Saturday, a Chinese state media editorial charged the Japanese official with performing a diplomatic maneuver that was “both reckless and fundamentally flawed”.

“A conflict between Japan and China would not be a small-scale encounter; it would probably involve other nations, including the US, and could quickly spiral into a large-scale conflict 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 discussing such scenarios, maintaining a “strategic ambiguity” also preferred by Tokyo’s main security ally, the United States.

However, 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 advances toward potential armed takeover, China has also been escalating its non-military activity and its statements towards the island.