Roanapur is a small city in the Southern Thailand that is controlled by the various syndicates and mafia. It attracts the worst of the worst from the world.
Roanapur is the major setting from the Black Lagoon series that was created by Rei Hiroe. The series first began serialization in Shogakukan's Sunday GX magazine on April 19, 2002. It first appearance was in Black Lagoon Volume 1 CH. 0 "Black Lagoon", and the first anime appearance is in Black Lagoon Ep. 1 "The Black Lagoon".