This Tanga - based group has at its core the two artists Frederick Mariki aka Mkoloni and John Simba aka Dr John. Wagosi wa Kaya comes from the Sambaa language, meaning home boys. They joined together to form the group in 1996 and started to perform in concerts around Tanga region but after a very short period their popularity quickly grew and they became a household name all over Tanzania. Their style of music is unique, original and fresh though under the broad umbrella of Swahili hiphop bongo flava.

Wagosi wa Kaya touched the hearts of their many fans who were mostly poor people, because of their potent and critical lyrics, and the amusing way in which they deliver. They mostly sing about problems facing Tanzanian society like hospital conditions, corruption in the police and other areas as well as the poor performance of Tanzania's national soccer team. Their song "Tanga Kunani?" (What's going on in Tanga?) was banned by Tanga's regional commissioner saying that it degraded the true face of his region. The group represents a creative and positive face of Swahili hiphop, singing in an accent that is funny and deliberately with a broad dialect of the Tanga region.

The group has already released three albums, Ukweli Mtupu (2001), Ripoti Kamili (2003) and Nyeti (2005). Wagosi wa Kaya is one of the most original groups in bongo flava and a must for any self-respecting Swahili music festival.