"On June 28, the Japanese Embassy in Russia was expressed a strong protest in connection with the plans of the Japanese authorities to conduct a series of joint military exercises with Germany and Spain on the island of Hokkaido in the immediate vicinity of the borders of the Russian Federation from July 19 to 25," the statement said.
Moscow considers Tokyo's plans to hold military exercises near Russia's borders as a potential threat to its security, the ministry said.
"It [embassy] was warned about adequate countermeasures to strengthen the defense capability and protect the sovereignty of the Russian Federation," the ministry concluded.