Jason Mangena, known as Jman, is a London-based MC and rapper with Jamaican roots, working in jungle and drum and bass. Raised in Croydon, Jman became a resident at Subheavy and Unleashed. In 2010, aged 18, Jman signed with Greasy Vinyl Records; the album Auranography followed in 2013. Jman’s later album Free Dank came out on High Focus Records in 2015.
In 2016, Jman formed Babylon Dead with producer Illinformed. Their collaborative albums include 2000BD and Book of the Dead. Jman also founded Jman & The Argonautz, releasing Therapy in Session on High Focus Records in 2023. Outside those projects, Jman co-owns No Ice Cream Sound, a dub and reggae label and soundsystem.
In 2026, Jman released One (TR Tactics Remix) on Night On Earth Records with Tanukichi and TR Tactics. That year, he released OMFD on Sika Records with Higher Sector. His 2026 releases also include Healing / Satisfy on Banana Bombs Records with Chris Munky and Operon, and Warning on Garage Shared with Ashdunn. He released Afterhours EP on Jungle Cakes with DJ Gaw and Rivibes in 2026.