Joseph Haule (born December 29, 1975), popularly known as Professor Jay, is a Tanzanian hip hop artist and politician(CHADEMA). He is one of the prominent representantives of the "Bongo Flava" Tanzanian hip hop subgenre, which mixes elements from both Western hip hop and the Tanzanian tradition (including swahili lyrics as well as an activist attitude towards Tanzanian social issues such as HIV/AIDS, wealth, inequality, and political corruption).