Pat Morita was 51 in The Karate Kid when he played the character 'Mr. Miyagi'.
That was over 40 years ago in 1984.
In 2005 he died aged 73, starring in 93 films in his career, 69 of those after The Karate Kid was first released. If he were alive today he would be 91.
In The Karate Kid, I think Pat Morita looks: