Karl Yune has joined the cast of the CW drama Arrow. He will recur as Maseo Yamashiro, a skilled martial artist who is married to Katana (Devon Aoki). The character will be introduced in flashback as Oliver’s (Stephen Amell) handler — a teacher and a friend who advises and helps the Arrow become a superhero. Yune’s credits include Real Steel, Speed Racer and upcoming thriller The Invitation. He is repped by Global Artists and Zero Gravity Management.