Masamune played “Shredder” in Michael Bay’s “Teenage Mutant Ninja Turtles” (2014); Kevin Hall-Yoshida (Paxton’s dad) in “Never Have I Ever”; Dr. Matt Lin (Starring role) in 2019 EMMY Award and Peabody Award-winning series “Artificial”. He has had lead stage roles directed by Tony Award winner Mary Zimmerman (Goodman Theatre) and Tony Award Winner Dan Sullivan (Williamstown Theatre Festival). He has worked with playwrights A.R. Gurney (Williamstown Theatre Festival) and Tony Award. Nominee Irene Mecchi (American Conservatory Theatre). He also was a member of the nationally recognized troupe, Theatre of Yugen, performing classical Japanese theatre (Noh/Kyogen).
He descended from an old Japanese samurai-class family. Other notable ancestors of his include Hakucho Masamune (novelist/playwright), Isao Masamune (banker-former President & Chairman of Industrial Bank of Japan), Juichi Nozoe (politician-House of Representatives in Japan), Kinoshita Sukenai (Warrior Retainer -Isahaya), Atsuo Masamune (poet/lit scholar), and Tokusaburo Masamune (painter)
He has trained and performed samurai sword fighting for 20 years.