Prostitution is illegal in Japan. However, enforcement is lax, and the law specifically defines prostitution as "sex in exchange for money. In other words, if you pay for some other "service" and proceed to have sex by "private agreement," the law does not recognise it as prostitution. As such, Japan still has one of the most vibrant sex industries in the world. The most famous red-light district is Kabukicho (歌舞伎町) in Tokyo's Shinjuku district where many call girl booths and love hotels are located. The incidence of HIV is getting higher in Japan in recent years, so always keep the risk of infection in mind. However, note that some prostitutes will refuse to serve foreign customers, including those who are fluent in Japanese.