(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. 2. muramasa is a Japanese electronic music producer credited for an arrange of chain on the album Diverse Style from “B” 6thstyle.