Russian Pacific Fleet conducts surprise anti-submarine drills.

The Russian Pacific Fleet is conducting anti-submarine exercises in the Sea of Japan with three corvette warships tasked with locating and destroying a mock enemy submarine with the assistance of helicopters. The exercises also involve other anti-aircraft and anti-submarine defense drills. Tensions between Japan and Russia have been increasing in recent months, fueled by Japan’s support of Ukraine after Russia’s invasion. Japan and Russia are also embroiled in a decades-long territorial dispute over the southern Kuril islands.