The All Japan Judo Federation is probing allegations that a top female judoka was the target of an inappropriate sexual advance in December 2011 by a director of the body.

Former Olympic silver medalist judoka Noriko Mizoguchi said Thursday that the female judoka, whose name was not released, claimed that the director, also unnamed, tried to hug her and kiss her on a Tokyo subway elevator.

Mizoguchi, a medalist at the 1992 Barcelona Games, revealed the female athlete's allegations against the federation director during a Tokyo symposium on eradicating abuse in sports.