Japanese authorities have made a big bust -- literally -- cracking down on a prostitution business catering to men who prefer large women.

The business, dubbed Makkusu Bodi (Max Body), was for men who like “explosive boobs and bums,” police told the Tokyo Times. Police arrested the suspected leader of the prostitution ring, identified as 41-year-old Keiko Saito, a former prostitute herself.

About 30 large women worked for Saito, including one 150-kilogram (330-pound) prostitute, according to the Times. The hefty prostitutes offered “on call” service at hotel rooms.

Saito allegedly earned $4 million in the three years that Makkusu Bodi was operating. Saito started the business “because she noticed that large women were preferred by some customers,” the Times reported.