Nobuyoshi Araki was born May 25, 1940 in Tokyo, Japan and is considered one of the most prolific artists alive or dead in Japan and around the world. Having published over 350 books, many of his photographs are erotic while others have been called pornographic. Araki took his first photograph while in the 6th grade on a school trip to Nikko with a camera lent by his father. He chose to study photography in college and ended up working for a major advertising agency upon graduating.
A simple google search will bring up tons of his erotic images, but I like his lesser-seen work:
Araki’s official site is arakinobuyoshi.com.
There’s also a good interview at Japan Times.