There are, at least, two executors with such name.
1) Hentai - Jacob Nibo (Jakob Nybo), the DJ from Denmark, executing music in styles experimental, ambient. 2) HENTAi - the Russian rock group from Nizhni Novgorod.
Though hentai in the West and in Russia name a pornography in an anime and a manga, in the Japan the word isn't used in this sense. «HENTAi» consists of two hieroglyphs: «HEN» ((変) — "strange" — and «TAi» (態) — "behavior", and literally it designates "METAMORPHOSIS". Till the end of a XIX-th century it didn't carry any sexual implied sense.