Masi Oka. Actor: Heróis. Masayori "Masi" Oka is a Japanese American actor, producer and digital effects artist. He became widely known for his role on NBC's Heroes as Hiro Nakamura and in CBS' Hawaii Five-0 as Doctor Max Bergman. Oka was born in Tokyo, Japan, to Setsuko Oka. His parents divorced when he was one month old; he was raised in a single parent family and has never met his...