A combination of 10 Russian Navy and Chinese People’s Liberation Army Navy ships sailed from the Sea of Japan to the Pacific Ocean through the Tsugaru Strait between Japanese home islands of Honshu and Hokkaido, Joint Staff of the Japan Self Defense Force said in a press statement.

The Japanese Maritime Self-Defense Force spotted the ships at on Monday, in waters about 70 miles southwest of Okushiri Island in Hokkaido. The ships sailed east through the strait into the Pacific Ocean. The release noted that it was the first time naval vessels from both countries had sailed jointly through the strait. The Joint Staff release identified the Chinese ships as Type 055 destroyer Nanchang (101), Type 052D destroyer Kuming (172), Type 054a frigates Binzou (515) and Liuzhou (573) and a unnamed replenishment ship (902). Russian ships were the destroyers Admiral Tributs (564) and Admiral Panteleyev (548), corvettes Gromkiy (335) and Hero of the Russian Federation Aldar Tsydenzhapov (339) and the missile range instrumentation ship Marshal Krylov (331).

Source: https://news.usni.org/2021/10/19/10-chinese-russian-warships-sail-through-japanese-islands