Kai Doh Maru(怪童丸Kaidōmaru) is an OVA anime directed by Kanji Wakabayashi and produced by the Japanese animation studios Production I.G. and I.G. Plus. It was released in Japan in 2001 by those companies and, in 2003, in the U.S. by Manga Entertainment. In Australia, it is distributed on DVD by Madman Entertainment.