Chaka (Black Lagoon)

Chaka is a villain who appears in the Black Lagoon manga and anime during the "Fujiyama Gangster Paradise" arcs as a major antagonist.

Anime
In the Black Lagoon anime Chaka was voiced by Jonathan Holmes (English dub) and Wataru Takagi (Japanese dub)

Trivia
Chaka's character and appearance is likely based on Kakihara from Ichi The Killer as both of them are longing for a strong opponent equal to them and are sadistically violent.