Six vessels including the China Coast Guard operate 140 nautical miles east of Taiwan, applying pressure on Japan-Philippines maritime negotiations.
Tanaka TakashiSix Chinese Coast Guard Vessels Operate 140 Nautical Miles East of Taiwan, Pressuring Japan-Philippines Maritime Negotiations
What appeared on the waters east of Taiwan was not a warship, but a "white ship." According to USNI News, as of June 8, the Chinese fleet was deployed approximately 140 nautical miles east of Taiwan, consisting of two vessels from the China Coast Guard, three patrol boats from the Maritime Safety Administration, and one rescue and salvage vessel. It is not as conspicuous as the aircraft carrier strike group of the People's Liberation Army Navy. However, from the perspective of someone who has long observed the first island chain with the Japan Maritime Self-Defense Force, the location this time is indeed the issue.
Chinese Operations from June 6 to 10
According to Chinese announcements, the Ministry of Transport organized maritime authorities from Fujian Province and Guangdong Province, the East China Sea Navigation Guarantee Center, and the East China Sea Rescue Bureau to conduct maritime traffic law enforcement and hydrographic surveys in the waters east of Taiwan from June 6 to 10. Reports from Xinhua positioned this as a "necessary response" to Japan and the Philippines beginning negotiations on maritime boundary delineation that includes the waters east of Taiwan.
On June 7, the Taiwan Coast Guard stated that four vessels, including Coast Guard 06, Coast Guard 08, Coast Guard 09, and East Sea Rescue 113, had departed from Xiamen in Fujian Province towards the waters around Taiwan, arguing that China has no sovereign rights in the waters east of Taiwan. The Taiwanese side explained that they deployed patrol vessels from Tamsui, Chiayi, Kaohsiung, Nagahama, and Hualien for monitoring. While Chinese vessels did not enter Taiwan's restricted waters, the Taiwanese side added that "normal traffic was maintained," which indicates that this activity was conducted under the pretext of ensuring the safety of navigation.
Not a Military Operation, but Normalization of Jurisdiction
It is premature to immediately interpret this fleet as preparations for a blockade. The Coast Guard vessels and Maritime Safety Administration vessels have different levels of armament and missions, carrying different political signals than naval vessels. However, the fact that the familiar "law enforcement" methods seen in the Taiwan Strait and the South China Sea have emerged in the waters east of Taiwan, that is, on the Pacific side, is not insignificant.
This maritime area is not merely a distant issue for Japan. The line from Yonaguni Island, Ishigaki Island, and Miyako Island to the Bashi Channel, and further into the Philippine Sea, serves as a back channel connecting the defense of the Nansei Islands and the SLOC (Sea Lines of Communication) towards Guam. If China continues to repeat administrative actions combining "traffic management," "hydrographic surveys," and "rescue" here, it will accumulate established facts regarding the use of these waters during peacetime.
Pressure on Japan-Philippines Negotiations is Also a Japanese Issue
On May 28, Tokyo and Manila indicated their intention to begin negotiations on the delimitation of exclusive economic zones and continental shelves. China criticized this as "illegal and invalid," asserting that its interests extend to the waters east of Taiwan. What is noteworthy here is that China has not only issued diplomatic protests but has also sent maritime administrative vessels into the actual waters.
From Japan's perspective, this is an extension of the pressure experienced around the Senkaku Islands. However, in the case of the Senkaku Islands, it was a direct security issue concerning Japan's territorial waters and contiguous zone. In the case of the waters east of Taiwan, the area is broad, and the legal issues overlap with the EEZ, Taiwan's status, Japan-Philippines boundary delimitation, and the freedom of international navigation. If the Japan Coast Guard, Japan Maritime Self-Defense Force, Ministry of Foreign Affairs, and Ministry of Defense do not share situational awareness at the same pace, there is a risk that Japan will respond to the other party's "administrative actions" solely as a military issue.
What is Required of the JMSDF is Not Flashy Countermeasures
In my view, what is needed at this stage is not to deploy escort ships to the forefront. Rather, it is to combine P-1 patrol aircraft, P-3C, coastal surveillance, satellite information, Coast Guard patrol vessels, and publicly available information from the Philippines and Taiwan to chronologically accumulate the movements of the white ships. How many vessels moved, under the command of which ministries, which routes were used, and under what pretext they operated. Without this record, when the same area is claimed as "normal operations" months later, Japan will lose the material to counter the claim.
- Confirmed period: According to the Chinese announcement, from June 6 to 10, 2026
- Focus of Taiwan side and USNI reports: Activities of six vessels approximately 140 nautical miles east of Taiwan
- Main composition: Chinese Coast Guard, Maritime Safety Administration, rescue and salvage vessels
- Political background: China's backlash against Japan-Philippines maritime boundary negotiations
The Blind Spot in Southwest Defense Lies in the Difference in Language
During the Cold War, the JMSDF only needed to track the clear military target of the Soviet Pacific Fleet. In today's East Asia, navies, coast guards, maritime administrations, fishing vessels, and survey ships use different legal faces in the same strategic space. The recent activities east of Taiwan are a typical example of this.
The real challenge is not whether we could track the six Chinese vessels. It depends on whether Japan views this type of action as "maritime traffic management," "a gray zone situation," or "pressure on the Pacific side of the first island chain," which will change the initial response. Before the shortage of vessels, if the organization of language and authority is delayed, the waters behind the Nansei Islands will be colored in the administrative map of the opponent before any fighting occurs.
Main References
- USNI News, Chinese Flotilla Surges East of Taiwan Amid Spat with the Philippines, Japan, June 8, 2026
- Xinhua via People’s Daily, China concludes maritime traffic enforcement operation, June 10, 2026
- Focus Taiwan, CGA condemns China’s maritime operations in waters east of Taiwan, June 7, 2026
- China Daily Asia, CCG holds ops east of Taiwan island, June 9, 2026
Six Chinese vessels conducted operations approximately 140 nautical miles east of Taiwan from June 6 to June 10, 2026. This included two Chinese Coast Guard ships and three maritime enforcement vessels, aimed at asserting China's claims amid Japan and the Philippines' maritime boundary negotiations. Taiwan responded by deploying its own vessels to monitor the situation.
- Six Chinese vessels were active approximately 140 nautical miles east of Taiwan.
- The operation was conducted from June 6 to June 10, 2026.
- The vessels included two from the Chinese Coast Guard and three from the maritime enforcement agency.
- The operation was framed as a response to Japan and the Philippines beginning maritime boundary negotiations.
- Taiwan deployed its own vessels to monitor the situation.