A 40-year-old contract worker was arrested in Tokyo Thursday after police matched his DNA to semen found on an 18-year-old schoolgirl's skirt while she was riding the Japan Rail Sobu line. The serial jerkoff artist is suspected in around 110 similar incidents on Tokyo trains over the past few years, the Asahi Shimbun reports.

Tetsuya Fukuda admitted to wiping his fluids on female train passengers about 2 or 3 times a month since 2011. He first became a suspect after the incident with the schoolgirl last December, according to Asahi Shimbun.

Tokyo Metropolitan Police believe Fukuda cut holes in his jacket pockets so he could more discreetly fiddle with his dick on public transit.

“I get excited when in close contact with a woman on a crowded train,” he allegedly told police, according to TBS News.

He's been charged with vandalism—apparently for damaging the skirt.

[h/t Mirror, Photo: TBS News]