Nobuyoshi Araki has been the subject of retrospectives at the Hara Museum and the Tokyo Museum of Contemporary Art; imagine someone like Richard Kern getting a show at the Whitney and you'll have some sense of Araki's achievement. (Thanks to Michelle for the links.)
Nobuyoshi Araki (Photology)
Nobuyoshi Araki Photography (Flash site)
Nobuyoshi Araki (Sex TV profile)
Nobuyoshi Araki (Taka Ishii Gallery, Tokyo)
Nobuyoshi Araki - Polaroids (Assembly Language)
"Araki by Araki" (Amazon)