Not all hentai, though, is quite as extreme as that. I’m sure we have all heard of things like tentacle porn-a subgenre of hentai that features petite animated girls getting ravaged by strange and often unidentified tentacles in every orifice. The term, rather, is shorthand for a phrase roughly translating to “any perverse sexual desire.” The word also derives from the ancient Japanese terms for “change,” “weird,” and “strange.” And, looking at some of the Hentai available on the web, this is an appropriate label. Hentai in Japan does not necessarily refer to this genre of anime and manga porn, though. Its popularity is actually probably highest in the United States. Lots of pornophiles out there swear by it, though, and it has become one of the most popular genres of porn, even outside of Japan. Hentai Fox! Want to read some XXX manga? Alright, I’m going to level with you guys-hentai is not really my thing.