Futanari(ふたなり?, seldom: 二形, 双形, literally: dual form; 二成, 双成, literally: [to be of] two kinds), is the Japanese word for hermaphroditism, which is also used in a broader sense for androgyny.
Beyond Japan the term is used to describe a commonly pornographic genre of computer games, comics and animations, which includes characters that show both primary sexual characteristics. In today's language it refers almost exclusively to characters who have an overall feminine appearance. In that case the term is also often abbreviated as futa(s), which is occasionally also used as a generalized term for the works itself.
The Japanese folk religion created diverse fantasies related to sexual characteristics. Traditional vocal pieces that date back hundreds of years deliver rough evidence that a change of gender was not ruled out and that the representation of the gender was used to worship deities—like the Dōsojin which sometimes had ambiguous gender, being neither male nor female. Leupp adds that the origins might even reach back to the origins of Buddhism, since the deities would not necessarily have a fixed or determinable gender. Likewise spread the belief that some persons could change their gender depending on the moon phase. This coined the term hangetsu (半月), which can be literally translated as "half month" or "half moon", which was used describe such beings. It is assumed that traditional clothing, which made it more difficult to distinguish men from women like in other cultures, might have had an influence on this development. To restrict women from accessing prohibited areas and to avoid smuggling by hiding items in the belt bag guard posts were assigned to perform body checks. In historical records, it can be seen that guards liked to joke about this matter quite frequently, resulting in various stories and even poems. Whether anatomical anomalies, like clitoromegaly or sexual maldevelopment, led to these assumptions remains an open question.
At the end of the Heian period (from the 12th to 14th centuries) dances from shirabyōshi (白拍子) were quite popular. These shows were performed by men dressed as women performing traditional dances and served to amuse the imperial court. After the end of the Battle of Sekigahara at the beginning of the 16th century the population has seen the lifestyle of military as growingly sloppy and described it as a kind of effeminacy. This lead to the point where labeling someone as feminine was equal to an insult or discrimination.
Until 1644, when Japanese onnagata actors were required to adopt male hairstyles regardless of the gender they were portraying, actors playing characters like female warriors capitalized on the interest in the futanari quality, which was common in both samurai and commoner society.
In anime and manga
Example illustration of two futanari variants. One with testicles (so called full package futanari) and one without.
Originally the Japanese language referred to any character or real person that possessed masculine and feminine traits as futanari. This changed in the 1990s as drawn futanari characters became more popular in anime and manga. Today, the term commonly refers to fictional (drawn), female looking, hermaphrodite characters. Futanari is also used as the term for a specific genre within hentai related media (pornographic anime or manga) that depicts such characters.
To differentiate between fictional characters and real trans women, the Japanese language adopted the Anglicised term newhalf (ニューハーフ,nyūhāfu?), which is used for the latter.
Futanari manga became popular in the 1990s and quickly became a pervasive part of the industry, cross-pollinating with multiple genres.Toshiki Yui's Hot Tails has been described as the best known example of the genre in the West.
^ abcdefg(German) Krauss, Friedrich Salomo et al. Japanisches Geschlechtsleben: Abhandlungen und Erhebungen über das Geschlechtsleben des japanischen Volkes ; folkloristische Studien, Schustek, 1965, pp. 79, 81
^Jacobs, Katrien (2007). Netporn: DIY web culture and sexual politics. Critical media studies: institutions, politics, and culture. Rowman & Littlefield. pp. 103–104. ISBN0-7425-5432-5.