日本防衛省监控到中国3艘海军艦艇与俄罗斯军舰共同航行，其活动范围几乎绕行日本列岛一周。[1]根据日本防衞部门的观察，这支联合编队先前从沖绳附近进入太平洋，经北海道北方宗谷海峡驶入日本海，随后穿越对马海峡南下进入东海。[1]日本防衞省监测到中俄艦艇8月2日晚间9时左右航经长崎县对马东北方约50公里海域，3日通过对马海峡。[1]
中俄海军的联合活动范围持续扩大。[1]2025年8月期间，中俄艦艇同时出现在日本海、鄂霍次克海、西太平洋及东海等多个海域。[1]此外，在2026年6月，中俄4艘军舰进入太平洋，并在日本专属经济区内实施了实弹射击演习。[1]日本在其最新的2026年版防衞白皮书中将中国定位为前所未有最大的战略挑战。[1]
Japan's Ministry of Defense has detected three Chinese naval vessels operating in coordination with Russian warships in a circumnavigational voyage around the Japanese archipelago [1]. The Chinese ships transited the Tsushima Strait southward into the East China Sea after the joint flotilla had previously entered the Pacific Ocean near Okinawa and navigated through the Soya Strait north of Hokkaido into the Sea of Japan [1].
According to Japan's monitoring, the combined Chinese and Russian task force sailed approximately 50 kilometers northeast of Tsushima in Nagasaki Prefecture on the evening of August 2nd at around 9 p.m., before passing through the Tsushima Strait on August 3rd [1]. The scope of coordinated operations between the two nations has expanded significantly, with Chinese and Russian vessels simultaneously traversing the Sea of Japan, the Sea of Okhotsk, the western Pacific, and the East China Sea in August 2025 [1]. In June 2026, four military ships from both countries entered the Pacific and conducted live-fire exercises within Japan's exclusive economic zone [1].
Japan's 2026 Defense White Paper characterizes China as an unprecedented strategic challenge of the highest magnitude [1], reflecting growing concern over the expanding pattern and scale of Chinese-Russian maritime coordination in waters surrounding Japan.