Masaharu Satō is a veteran voice actor born March 15, 1946 in Tokyo, Japan. He currently works for Aoni Production.

Along with the late Kōji Totani, he is considered the No. 1 supporting actor of the "seiyū world".

Satō is most known for the roles of Gyokaku Kumoi (Bleach), Buffaloman and Sunshine (Kinnikuman), Miyamoto Musashi (Yaiba), Adah (Mushiking: King of the Beetles), Zorom (Slayers), and Doramed III (The Doraemons). He is also known for playing numerous other roles in the Kinnikuman, Dr. Slump and Arale-chan, Fist of the North Star, and Dragon Ball series.

Satō also made a voice guest in episode 3 of GoGo Sentai Boukenger and Juken Sentai Gekiranger as a rare moment.