John Blaq (born Kasadha John on 16 July 1996) is a Ugandan musician, songwriter & performing artist .
He is commonly known for his bass vocals and dancehall music accompanied with the introduction [Aya Basi) in all his songs.
John Blaq attended Lwanda Primary School and Hasan Tourabi Primary School for Primary Leaving Examination. In 2012, he joined Bweyogerere Secondary School, where he attained both a UCE and a UACE certificate in 2016 and 2018, respectively.
John Blaq broke through in 2018 with his single, "Tukwatagane". The song "Sweet Love" was his first collaboration with Vinka, and was released in December, 2018. His first concert took place in Freedom City, Kampala on 29 November 2019 and was named Aya Basi Concert after his common phrase [aya basi].
In September 2019, Kasadha signed with Pepsi under their promotion of the "Tukonectinge Pepsi" campaign. In 2019, he participated in a campaign for fighting teenage pregnancy.