A 54-year-man faces multiple charges of incapacitated rape after allegedly drugging and sexually assaulting up to 100 women he came into contact with as part of a fake study he conducted on sleeping habits.

Hideyuki Noguchi has formally been charged by Japanese police in about three dozen cases, but CNN reports he has openly admitted to investigators his number of victims is much closer to 100.

Authorities add Noguchi taped and recorded many of the incidents, later selling the videos to porn sites which to date has netted him an estimated $100,000 in profits. Police only became aware of Noguchi's sinister dealings after one of his victims saw herself in one of his videos.

A subsequent investigation found Noguchi has no medical training and has been conducting his scam since as early as 2011. Authorities add he happened upon his victims by running ads seeking females aged from their teens to their early 40s.

According to the Huffington Post, police now speculate Noguchi lured his victims to hotels and resorts across the area by claiming he planned to administer tests measuring "blood pressure during sleep."

Instead, Noguchi allegedly slipped the unsuspecting women sedatives that caused them to pass out and allowed him to have his way with them.

For some, the case forming against Noguchi brings to mind the one that now has former NFL star Darren Sharper jailed without bond. Sharper has been charged with drugging and raping numerous women in as many as three different states. Police allege Sharper met many of his victims at different bars and ultimately slipped date rape drugs into their drinks before sexually assaulting them.

Sharper has denied all the claims and argues any sex he engaged in was consensual.

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