Japanese equivalent to Wigger; it's the emulation of black culture in Japan. "The name given to the fashion sensibilities of all black wannabes"
Burapan is a combination of the Japanese phonetic of "black" (burakku) and the Japanese word for "prostitute" (pansuke), a prostitute that whores herself out to black men.
So basically, the same could be said for Japanese people who immerse themselves in Black American culture.
Damn, look at that tanned up burapan over there with that big-ass fro.