Rare term referring to the sex industry or prostitution. Often used in contexts discussing the 風俗 (sex-related entertainment) business.
See also: 風俗
The sex industry is strictly regulated by law.
Compound of 風 (ふう, 'appearance; customs') and 商売 (しょうばい, 'business'). The exact derivation is uncertain; it may be a euphemistic coinage for the sex trade.