James was born in Yokohama and raised in rural Yamagata, Japan. He moved to the U.S. after high school and earned a BA in literature from Wheaton College and an MFA in acting and directing from the University of Missouri-Kansas City.

James is based in NYC, working as an actor, director, translator, and writer. Many fans know him as Robert Minoru from Marvel's Runaways. He has originated many roles on and off Broadway, including Sarah Ruhl's The Oldest Boy, Richard Greenberg's Take Me Out (2003 Tony Award for Best Play), A Naked Girl on the Appian Way, John Guare's A Few Stout Individuals, and Julia Cho's Durango. His credits also include characters in world-premiere stage adaptations of literary classics, such as Yunioshi in Truman Capote's Breakfast at Tiffany's on Broadway and Toru in Haruki Murakami's The Wind-Up Bird Chronicle at the Edinburgh Int'l Festival and the Singapore Arts Festival.