Russia's navy fired supersonic anti-ship missiles at a mock target in the Sea of Japan, the Russian defence ministry said on Tuesday.
"In the waters of the Sea of Japan, missile ships of the Pacific Fleet fired Moskit cruise missiles at a mock enemy sea target," it said in a statement on its Telegram account.
"The target, located at a distance of about 100 kilometres (62.14 miles), was successfully hit by a direct hit from two Moskit cruise missiles."
The P-270 Moskit missile, which has the NATO reporting name or SS-N-22 Sunburn, is a medium-range supersonic cruise missile of Soviet origin, capable of destroying a ship within a range of up to 120 km (75 miles).
Japan's foreign minister Yoshimasa Hayashi said Tokyo will stay vigilant against Moscow's military operations, while adding that no damage had been reported after the missile launches.
"As Russia's invasion of Ukraine continues, Russian forces are also becoming more active in the Far East, including Japan's vicinities," Hayashi told a regular press conference.
The firing of the missiles comes a week after two Russian strategic bomber planes, capable of carrying nuclear weapons, flew over the Sea of Japan for more than seven hours in what Moscow said was a "planned flight".
Asked about Russia's plans to station tactical nuclear weapons in Belarus, Hayashi said Japan condemned the move and demanded Russia and Belarus to stop "such an action that would further increase tensions".
(Reporting by Lidia Kelly in Melbourne, Additional reporting by Kantaro Komiya in Tokyo; Editing by Himani Sarkar)
