Who is Mako? Born Makoto Iwamatsu (岩松 信 ); December 10, 1933 − July 21, 2006. He has played roles as the token Asian in many films including the thief in the Conan movies or the Korean master in Remo Williams and also showed up in Pearl Harbor as Admiral Yamamoto. But more importantly his distinctive voice was the Narrator for Dexter's Lab and the terrific turn as the malevolent Aku on Samurai Jack.
I always liked his work and will miss him.
ps. Aku 悪 means EVIL!