Corvettes from the Russian Navy’s Pacific Fleet have begun a new deployment towards the Sea of Japan.

In the context of rising military activity in the north-western Pacific, the Russian Navy’s Pacific Fleet has initiated a fresh deployment of corvettes to the Sea of Japan, strengthening its presence and training in one of north-east Asia’s most sensitive maritime areas. Russian official outlets circulated the information, reporting that surface combatants had departed their Far East bases to carry out patrol and training tasks in areas regarded as strategically important.

Steregushchiy-class corvettes in the Sea of Japan deployment (Project 20380/20385)

Although the statement did not set out the route in detail, the ships involved are understood to be modern Steregushchiy-class corvettes from Project 20380 and/or the improved Project 20385 variant, including vessels such as Gromkiy (335) and Sovershennyy (333), both assigned to the Pacific Fleet. Displacing roughly 2,200 to 2,500 tonnes, these units are built to operate in littoral and near-sea environments.

Only a few days earlier, the same corvettes had taken part in anti-submarine drills in areas close to the Kuril island arc, where they practised detecting and conducting a simulated neutralisation of an “enemy” submarine using the Paket-NK system. Those manoeuvres also featured defensive training against unmanned aerial vehicles and uncrewed surface craft.

From an observer perspective, the move from exercises in constrained waters to deployments across wider areas of the Sea of Japan points to a planned sequence of progressive training, combining anti-submarine warfare scenarios, surface defence, and control of sensitive maritime spaces. It is worth noting that the Sea of Japan is a key zone both for the Russian Navy’s power projection and for regional surveillance, particularly given its direct access to the Pacific via the La Pérouse, Tsugaru and Korea Straits.

The Steregushchiy-class corvettes mentioned are equipped with anti-ship missile systems, short- and medium-range air defence, hull-mounted sonar, and integrated anti-submarine warfare systems. Their design emphasises reduced radar signature and the integration of sensors into a centralised combat system, enabling them to function as nodes within larger naval groupings.

In parallel, Japan has intensified its monitoring of Russian naval movements in the region, dispatching destroyers and maritime patrol aircraft when it detects Russian units transiting strategic straits. This pattern of mutual observation underlines why these waters remain among the most sensitive maritime areas in north-east Asia.

Images used for illustrative purposes.