Mitsuru Watanabe is a Japanese voice actor and theatre actor from Tokyo, born on December 10. He is affiliated with the talent agency Early Wing. Watanabe is a graduate of the Hyper Voice training school, having completed his studies there in 2012. His hobbies and skills include playing basketball, participating in survival games, and creating computer graphics.

In his voice acting career, Watanabe is known for his role as Dr. Kazamatsuri in the 2021 television anime series Inō no AICis, a part he played across all nine episodes. He has also provided voices for additional characters in other series. He had a role as an extra voice in the 2019 anime After School Dice Club and voiced a goblin character in an episode of the 2018 series Goblin Slayer. His ongoing affiliation with the agency Early Wing represents a consistent element of his professional career.