The Metropolitan Police Department and Kanagawa Prefectural Police arrested Lt. Cmdr. Shigehiro Hagisaki, a researcher at the Defense Agency's National Institute for Defense Studies, on suspicion of violating the Self-Defense Forces Law, which prohibits SDF members from divulging classified security information.
Hagisaki, 38, basically owned up to the allegations, police said.
The military attache at the Russian Embassy in Tokyo, identified by the MPD as Victor Bogatenkov, 44, a resident of Tokyo's Minato Ward, cannot be arrested because he has diplomatic immunity.