Shinnosuke Mitsushima is a Japanese actor. He is represented by Humanitè. After graduating from high school Mitsushima moved to Tokyo, where eventually got a job as a production director for the film Be Sure to Share. In 2010, he made his debut as a stage actor in Tokyo Metropolitan Theatre's production of Osorubeki Oya-tachi.
His older sister is actress Mitsushima Hikari, his younger sister is model Mitsushima Minami, and his younger brother is Mitsushima Kotaro, a basketball player for Rizing Zephyr Fukuoka of the Japan Basketball League.