was a Japanese-born American actor and voice artist who has been 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 (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 .