Rajab Abdul Kahali (born 15 March 1991), popularly known by his stage name Harmonize, is a Tanzanian Bongo Flava artist and music businessman born in Mtwara.

He migrated to Dar es Salaam around 2009 as fast as he completed secondary school, living his normal life while pursuing his music career.

He luckily got signed to WCB Wasafi record label, making him the first one to be signed to the label by the founder, Diamond Platnumz.

Songs like, “Aiyola”, “Show Me” and “Kwangaru” made a way for him to greatness. He later founded his own record label named Konde Music World.

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