Mizuho Tsushima is a Japanese voice actor and narrator affiliated with the Tokyo Actor's Consumer Cooperative Society, also known as Haikyo. She was born in Osaka Prefecture on November 2, 1959. Tsushima is a graduate of the acting course in the Film Studies Department at Nihon University College of Art and is a 9th-term graduate of the Haikyo training school, which she completed in 1981.

Her body of work includes a wide range of voice acting roles in television animation. Some of her notable anime credits include the character Dorothea in Princess Sara, Elina in Super Atragon, Akikage in the series about Sakamoto Kahei, Kagerouikuyo in Yoshimoto Muchikko Monogatari, and a peasant woman in Turn A Gundam. She also voiced the role of Aoyanagi in the Anpanman series and provided voices for other productions such as Andromeda Stories and Tokimeki Tonight. In addition to anime, Tsushima's career encompasses performances in OVAs, theatrical films, and numerous television dramas.

Recurring collaborations or patterns in her work are not readily apparent from the available information. A notable achievement in her career was receiving a special skill award.