Prostitution in modern Japan is made illegal by article 3 of the Anti-Prostitution Law (売春防止法, Baishun Bōshi Hō) of 1956.[1][2] However, the definition of prostitution is strictly limited to coitus with an 'unspecified person'.[1][3][4] This means that the sale of numerous acts such as oral sex, anal sex, mammary intercourse and other non-coital sex acts is legal.