Prostitution in Japan has a long history, and became especially popular during the Japanese economic miracle, as evening entertainments were tax-deductible.
Decreased sex drive in the 21st century has been blamed for the low Japanese birth rate and declining growth of the Japanese population.
In contemporary times Japanese pornography has gained a worldwide following and is frequently translated and exported to other cultures because of its large spectrum of themes and media.
Pornography in Japan has in recent times expanded into new mediums such as manga (hentai) and video games (eroge) in addition to the more common film and historic mediums.
In the Edo period it was enjoyed by rich and poor, men and women, despite being out of favour with the shogunate.
Despite the Anti-Prostitution Law of 1956, various legal loopholes, liberal interpretations of the law, and loose enforcement have allowed the sex industry to prosper and earn an estimated 2.3 trillion yen a year.
Notably, the Anti-Prostitution Law makes prostituting oneself a crime whereas those who use the services of a prostitute are immune from prosecution.
The adult manga/anime medium carries its own distinct subgenres as well.
Futanari or sexual attraction to androgynous people is an extensive subgenre of seijin manga.