prostitution disguised as massage service
Euphemistic wasei-eigo term for a type of sex service operating under the cover of a massage parlor. Often abbreviated as ファッションヘル or simply ヘルス.
wasei-eigo (Japanese-coined English), from fashion health
See also: ヘルス
The police cracked down on a fashion health establishment.
Apparently there's a fashion health place in the basement of that building.