A representative of a group seeking to help men falsely accused of molesting women has been arrested for allegedly photographing up a woman's skirt on a Tokyo subway last week, police said Wednesday.

Other passengers reportedly saw Mitsuru Nagasaki, 46, using the camera in his mobile phone to snap a shot of the woman sitting across from him on the Oedo Line at about 11 p.m. Thursday.

The passengers saw the picture on his phone, seized him and brought him to police, who booked him on a charge of violating a Tokyo ordinance against molestation on trains.

Police quoted Nagasaki as saying, "I was drunk and don't remember what happened well."

Nagasaki was arrested in October 1997 for molesting a woman on a train. He pleaded not guilty, but the Supreme Court rejected his appeal last September and fined him 50,000 yen.

The group he represents was established last July to help exonerate men wrongfully accused of molestation. Nagasaki was carrying literature about the group's activities when he was arrested, according to police.