Do the Japanese actually use the word "Hentai" to mean "Anime Porn", like in English? The English word "Hentai" likely came from 4chan. Thus, like a lot of Japanese loanwords that come from 4chan, I have to ask whether the Japanese actually use the word to mean "Anime porn" like in English. If it isn't, or if a different word is more often used, could someone share what that word is? The Japanese people I communicate with always find my use of it confusing or wrong.

No, _hentai_ is a typical "" that has gained a totally different meaning outside of Japan. It never means anime porn in Japan.

Wikipedia defines _hentai_ as "catch-all term to describe a genre of anime and manga pornography." In Japanese, this idea is well described by a slang word (lit "two dimension"). The opposing idea is of course ("three dimension", live-action ones or sometimes real people). They are often contracted to (lit "secondary")/ (lit "tertiary"). 18 is too broad and / are too specific.

Most Japanese fans understand these ateji argots: (lit "rainbow") for and (lit "disaster") for . Yeah, posting a image to a certain type of image board is certainly disastrous to the users :)

**EDIT:** Oops, I should've mentioned that / by themselves do not necessarily refer to X-rated ones, while it's hard to imagine a fan who dislikes porn. does not sell X-rated goods, for example.