Tetsuo Mizutori was a Japanese voice actor born in Tokyo on December 25, 1938. He passed away on July 14, 2010, at the age of 71. Throughout his career, he was affiliated with the talent agency Arts Vision. Beyond his voice work, he contributed to the industry as a lecturer at the Katsuta Voice Actor's Academy, where he instructed future talents, and he was a founder of the theatre group Gekidan Akapela Club. He was known to have a baritone voice range and often portrayed young men, elderly characters, and antagonistic roles.

Mizutori's career in voice acting began in the late 1960s and spanned over four decades. He became a familiar presence in anime throughout the 1970s and 1980s, building a substantial body of work. Among his most recognized roles were the栗头老师 (Kurigashira-sensei, or Curry-Hair Teacher) in Dr. Slump and the father of the main characters in the 1988 series Osomatsu-kun. In the Kinnikuman franchise, he was a regular voice, notably portraying Brocken Jr., a role the user specified, as well as Yosaku-san across multiple installments including the film Kinnikuman: Kessen! Shichinin no Seigi Chōjin vs. Uchū Nobushi. Other user-specified roles include Julicaesar in Great Mazinger, Rick in Kyōryū Tankentai Born Free, Folon in Ozanari Dungeon: Kaze no Tou, and Rudy Bochwitz in Dark Warrior. His work on the various Osomatsu-kun projects, including the films Osomatsu-kun: Iyami wa Hitori Kaze no Naka and Osomatsu-kun: Suika no Hoshi kara Konnichiwa Zansu!, as the father Matsuzō Matsuno is also well-documented.

Mizutori's extensive filmography includes prominent roles in several major franchises. He voiced Captain Gadem in the original Mobile Suit Gundam, a role he would reprise in compilation films and video games for years to come. He also contributed to other long-running series such as Soreike! Anpanman, Dragon Ball Z, and Nintama Rantarō. In the 1980s, he was a frequent presence in productions by Studio Pierrot.

His work extended beyond animation. He provided voices for video games, including the role of Hideo Shimazu in the Justice Gakuen series. He also participated in dubbing foreign films and television series for Japanese release and lent his voice to tokusatsu productions like Kyōryū Sentai Koseidon and Ultraman 80. His legacy is that of a versatile and prolific supporting actor whose contributions helped define numerous classic anime series over several decades.