Sound Sultan (born Olanrewaju Abdul-Ganiu Fasasi; November 27, 1976 – July 11, 2021) was a Nigerian rapper, singer, songwriter, actor, comedian, and recording artist. He was regarded as one of the pacesetters of modern hip hop music in Nigeria. He was notable for using his music to speak against poverty, corruption, bad governance and societal ills in Nigeria. Sound Sultan's career in show business started in the 1990s, when he hosted shows to raise money for studio sessions. By 1999, he had won numerous local talent-hunt shows. He released his first single Mathematics "Jagbajantis" in 2000, which was a hit in Nigeria. After independently releasing other singles and featuring in hit songs of other artists, he was signed by Kennis Music. Under Kennis Music, he released four albums. By 2007, his contract with the label expired and he partnered with Baba Dee to start Naija Ninjas, a parent organization for a record label, production outfit and clothing line. After starting as a rapper, he has worked in different musical genres from R&B to Afrobeat, soul and Nigerian Fuji music. He has said that artists shouldn't be judged on the genre in which they perform, that the important thing is the message conveyed in the music.