Pat Morita was 53 in The Karate Kid Part II when he played the character 'Mr. Miyagi'.
That was over 38 years ago in 1986.
In 2005 he died aged 73, starring in 93 films in his career, 64 of those after The Karate Kid Part II was first released. If he were alive today he would be 91.
In The Karate Kid Part II, I think Pat Morita looks: