A bus driver who used a hidden camera to film up the skirts of hundreds of schoolgirls has appeared in a Sydney court.
Takuya Koaze, 48, has pleaded guilty to three counts of secretly filming people to obtain sexual arousal.
He refused to speak to the media when he had his bail continued on Thursday at Hornsby Local Court.
Koaze was caught with more than 2500 images of mostly young teenaged girls, who had been photographed without their knowledge.
The images included 530 shots of Sydney girls in school uniform filmed inside the bus.
He also had more than 60 minutes of footage of young schoolgirls, some of whom appear to be as young as 10 or 11, filmed inside the bus, according to police documents.
The images focus on the victims' legs, buttocks and genital area.
Koaze came to the attention of police after taking a photograph of a woman who had stopped her car beside his bus.
The woman saw the defendant point a camera at her and made a formal complaint.
When authorities examined CCTV footage from the bus they found Koaze had fitted a camera to the lower hinge of the bus door, angled to film up the skirts of female passengers.
Magistrate Tim Keady adjourned the matter for sentencing at the Downing Centre Local Court on May 28.
