(For the Japanese ska band, see ムラマサ☆. muramasa is NOT the correct tag.) There are at least two artists with this name:
1. A British trap producer
2. A Japanese electronic producer 1. Alex Crossan is a 16 year old trap music producer from Britain. He describes himself as a "Young, Unsigned, English producer making fresh, exciting and intelligent experimental music."
He released his debut EP on TrapDoor in April 2013.

Read more about muramasa on Last.fm.