The two countries have been locked in a territorial dispute over a remote island chain since the end of the conflict.
Japan's coast guard said Esanbe Hanakita Kojima was last surveyed in 1987.
Moscow repeatedly called for the U.S. to step back from its military reinforcement of Japan and South Korea in response to Pyongyang's nuclear tests.
The fuel contains lead and can lead to brain damage.
This is why Russia and Japan still have no World War II peace deal.
Japan and Russia have still not signed a World War II peace accords due to the dispute.
Japanese Prime Minister Shinzo Abe said all four disputed islands belong to Japan.
A peace treaty doesn't exist between the two nations due to a territorial dispute