Johnathan Burks (born January 15, 1965) better known by his stage name Jaz-O, is an American rapper and record producer active in the late 1980s and early 1990s, best known for being the mentor of Jay-Z. Jaz is also known as the Originator and had a song called "The Originators" that featured a young Jay-Z in 1990. As simply the Jaz, he had success with his 1989 single "Hawaiian Sophie" from his debut album Word to the Jaz. He has been featured on some of Jay-Z's songs, (such as "Bring it On" from Reasonable Doubt) and the single "Ni**a What, Ni**a Who (Originator 99)" from Vol. 2: Hard Knock Life, where he was credited as Big Jaz. He also produced the single "Ain't No Ni**a" from Reasonable Doubt and the song "Rap Game/Crack Game" from In My Lifetime, Vol. 1. The album "Kingz Kounty (2002) - with The Immobilarie Present" marked the last time Jay-Z and mentor Big Jaz would ever collaborate with each other.