amok: No, that only means that you only know a very limited range of Hentai.... Hentai by itself is a term cover all erotic / pornographic manga and anime, not only those who have violent sex. There are many different types of erotic manga / anime, some very soft, some qutesi, some aimed at women etc.
As a bonus point, the term Hentai is only used outside Japan. Within Japan they use "ero manga" or "ero anime" instead.
LootHunter: Actually,
in Japan term Hentai means pervert/perverted. So, in that sense, it's closer to what TheGrimLord described.
[...]
indeed, that's what the worrd means. but as an identifier of a genre, "Hentai" is only used outside Japan. it has been adopted by non-Japanese as a genre name for a certain type of anime / managa.
I never claimed anywhere what the word meant, only what the genre is, so it is apples and ornages here. look up the defenition of the genre "Hentai", instead of what the word means.
and pervert can apply to much more than just violent pornography, that meaning only depends on your own moral compass. i.e. if you are homophopic then gay sex is perverted. BDSM does not need to be violent, but it all can be seen as perverted if you are very straight. if you are a racist, then miscegenation is perverted. a voyour that gets his/her kick from watching can be seen as perverted, and so on. an old man sniffing panties can be seen as perverted, but it is far from violent sex... anyway, this is just a side point as the discussion is on what is the genre of "Hentai"
edit - indeed, some would argue that you would need to be perverted to get any kick out of watching a cartoon or animation, no matter how plain or straight the sex is potrayed there. some would say it is perverted to watch any type of erotica / pornography.