Mako Iwamatsu (岩松 マコ, Iwamatsu Mako, December 10, 1933 – July 21, 2006) was a Japanese American actor and voice artist who was nominated for numerous awards. Almost all of his acting roles credited him simply as Mako. He is best known for his roles as Po-Han in The Sand Pebbles (for which he was nominated for the Academy Award for Best Supporting Actor), Akiro the Wizard in Conan the Barbarian and Conan the Destroyer, and for his voice roles as Aku in Samurai Jack and Iroh in Avatar: The Last Airbender. He was part of the original cast of Stephen Sondheim's Broadway musical Pacific Overtures. He has a star on the Hollywood Walk of Fame at 7095 Hollywood Blvd.
Mako died in Somis, California, on July 21, 2006, at age 72, from esophageal cancer. One day before his death, Mako had been confirmed to star in the film TMNT as the voice of Splinter. Kevin Munroe, director of the film, confirmed that Mako had completed his recording. The finished film was dedicated to Mako.
During the Avatar: The Last Airbender episode "The Tales of Ba Sing Se", the segment titled "The Tale of Iroh" features a dedication to Mako, the voice actor for Iroh for seasons one and two. In the sequel series The Legend of Korra, a lead male character was named after him (voiced by David Faustino).
After Mako's death, some of his roles, particularly Aku from Samurai Jack and Iroh in Avatar: The Last Airbender and The Legend of Korra, were taken over by American voice actor Greg Baldwin.