Mako Iwamatsu was a Japanese American actor and voice artist who was nominated for numerous awards. Many of his acting roles credited him simply as Mako where he omitted his surname. He is best known for his roles as Po-Han in The Sand Pebbles, 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.
Mako died in Somis, California on July 21, 2006, aged 72, from esophageal cancer. One day before his death, Mako had been confirmed to star in the film Teenage Mutant Ninja Turtles as the voice of Splinter. The finished film was dedicated to Mako.