Kamasutra (カーマスートラ, Kāmasūtora) is originally a four tankōbon manga (inspired by the homonymous book) created by Go Nagai and Kunio Nagatani and published by Tokuma Shoten in 1990. It was later adapted into an OVA, Kamasutra: The Ultimate Sex Adventure (究極のSEXアドベンチャー カーマスートラ, Kyūkyoku no Sekkusu Adobenchā Kāmasūtora), known in the United Kingdom as Kamasutra and in the United States as Kama Sutra and considered a hentai anime in the West. Source: Wikipedia (en)