Futanari
Futanari (meaning "two half" or "new half" in Japanese) is a special type of hentai, most often depicting hermaphrodites or females with male sex organs. It is argued that this may branched from yuri or yaoi as depictions are quite similar to those two and not of regular hentai. While futanari depictions look quite similar to those of an actual hermaphorodite, the genre is sometimes considered a form of youkai or monster sex. Youkai (the word is often translated as "devil" but refers to anything supernatural excluding gods) are often depicted as having a very similar look to human and it is more reasonable to include futanari under this category.
The subjects of futanari are more commonly known as "dickgirls", although this is considered vulgar in some anime fandom circles.