He attended Dartmouth College (Class of 1999), majoring in East Asian Languages and Literatures and minoring in Drama.
After college, he moved to Japan, where, after getting his start doing a women's underwear commercial, he was soon recruited by AAC Stunts.
Best known for his role as the mysterious murderer named Piece in the live-action drama Sh15uya, Musashi was also seen in Cutie Honey: The Live as Duke Seiya Anthony Watari IV, a bilingual gentleman in the service of the organization Panther Claw.
[1] Since then, he's largely worked as a stunt performer in films, television shows and video games, with scattered speaking parts.
In 2022, he was cast as Hansel, a High Table assassin, in The Continental: From the World of John Wick, a miniseries that premiered on Peacock in 2023.