Chinese vessels entered Japan’s waters in the East China Sea at two separate locations on Thursday, prompting Tokyo to lodge protests against Beijing.
Chief Cabinet Secretary Hirokazu Matsuno, the top Japanese government spokesperson, said Japan conveyed “strong concern” and lodged a protest against China through diplomatic channels after a Chinese military ship intruded into Japan’s waters.
According to the Japanese Defense Ministry, a Chinese Navy Shupang-class survey ship entered Japanese waters near Yakushima Island in Kagoshima Prefecture, off the island’s southwest coast, around 10 a.m., reported the Yomiuri Shimbun.
The naval vessel left around 1 p.m. from the west side of Kuchinoerabu Island, heading west, the ministry added.
It marked the 11th time since February for a naval vessel from Beijing crossed into Japan’s territory.
Surveying activities in other countries’ waters are forbidden under the United Nations Convention on the Law of the Sea.
However, international law also allows vessels, including military vessels, to pass through other countries’ waters as long as they don’t pose a threat to the countries’ security and order.
On the same day, two Chinese Coast Guard vessels also entered Japan’s territorial waters around the Senkaku Islands—referred to by China as “Diaoyu”—and tried to approach a Japanese fishing boat, Matsuno said.
The Japanese Coast Guard (JCG) said the intrusion was the first time Chinese coast guard vessels entered Japanese waters since May 24.
The vessels entered an area off the Minami-Kojima Island in the Senkaku Islands shortly after 11:50 a.m., the JCG’s 11th Regional Coast Guard Headquarters in Naha said, reported the Yomiuri Shimbun.
The Senkaku Islands in the East China Sea have mostly been administered by Japan since 1895, but Beijing began asserting its rights over the islands in the 1970s.
Japan’s coast guard subsequently sent out patrol boats to deter the Chinese vessels from staying in Japanese waters, and the Japanese government later lodged a protest with China via diplomatic channels.
Both sides agreed on June 3 on the need to promote dialogue and exchange while ensuring that their military hotline—which began operation in May—is being used “appropriately.”