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What law bans prostitution in Japan?

The Prostitution Prevention Law, enacted in 1957, forbids the act of having "intercourse with an unspecified person in exchange for payment." It also punishes acts including soliciting by prostitutes and organized prostitution, such as operating brothels.

Legal experts say it is hard for police to crack down on prostitution because it is tricky to verify if a couple had consensual or compensated sex.

The law meanwhile does not ban paid sex with a "specified person," or someone who has become an acquaintance. It also defines sex exclusively as vaginal intercourse. Thus other paid sexual acts are not illegal.

aaah donc mariage (persone spécifique) n'est pas prostitution. J'aurais pensé le contraire… Les lois sont mal faites !