Born to Japanese immigrants as Noriuke Morita, in 1932 they moved to California as fruit pickers. During World War II he was among thousands of Japanese-Americans who were sent to internment camps.
Later he abandoned a career as an aircraft technician to become a comedian in cabarets and television series, rising to fame in such series as "Happy Days" and "MASH".
But he is best known for his role as Ralph Macchio's mentor 'Mr Miyagi' in 'The Karate Kid' films, for which he received a best supporting actor nomination in 1984. Apparently he knew nothing about martial arts but managed to convince us as the quiet caretaker who guided Macchio to defeat his bullies.
You can find a fist of his film work history here.