According to analysts at the American magazine Military Watch Magazine, Russia’s Aerospace Forces used MiG-31I interceptor aircraft armed with Kinzhal ballistic missiles for training flights over the Sea of Japan. During the drills, Russian crews also tested aerial refueling capabilities.

The publication noted that the MiG-31 remains the fastest and highest-flying combat aircraft in the world, which, in the authors’ assessment, allows it to transfer substantial energy to a missile at the moment of launch.

The analysts also pointed out that the MiG-31I is the only combat aircraft capable of sustained cruise flight at twice the speed of sound. The aircraft is also designed for prolonged flight at a cruising speed of Mach 2.35, giving it the ability to redeploy quickly over long distances.

The magazine recalled that in October 2025, Ukrainian and Western officials said missiles launched from the MiG-31I had become more difficult for Ukrainian forces to intercept. As the authors explained, Kinzhal missiles follow a semi-ballistic trajectory and are capable of maneuvering in flight, making them far harder to destroy with air defense systems.

In the magazine’s view, the number of MiG-31I aircraft in service with the Russian Aerospace Forces could increase significantly in the near future. The article says more fighters currently in storage are being upgraded and overhauled to new standards.