Joseph Haule, popularly Professor Jay, is a Tanzanian hip hop artist. He was formerly a member of the group 'Hard Blasters', best known for their hit 'Chemsha Bongo' (then he used stage name Nigga J).
During his solo career, he has released a number of hits, including 'Nikusaidiaje' and 'Zali la Mentali (feat. Juma Nature)'. Just like Mr. II, he is a pioneer in Tanzanian Rap (Genge) and as well a legendary MC, who has remained one of the most popular hip hop musicians in Tanzania, despite of the influx of many new bidders.
He won a Best Song category in the 2006 Kisima Music Awards.