Police said Saturday they have arrested an elementary school teacher for allegedly filming video up a teenage girl’s skirt with a hidden camera on a train in Tokyo.

The arrest was the first since the Tokyo Metropolitan Government amended a law Tuesday to impose tougher penalties for such crimes, police said.

Those convicted under the new law face penalties of up to one year in prison or 1 million yen in fines. The previous maximum penalties were a six-month prison term or 500,000 yen in fines.

Police suspect Takayuki Ikei, 29, of filming an 18-year-old high school girl around 10:30 p.m. Friday. He allegedly put his digital organizer, equipped with a camera, under the girl’s skirt on the JR Yamanote Line.

Ikei admitted the allegations, saying he was drunk and could not resist filming the girl, police said.

The teacher was handed over to a station attendant at Takadanobaba Station after the girl realized what was happening and grabbed him, according to police.