Nariyoshi Miyagi, better known as Mr. Miyagi, is a fictional character portrayed by Pat Morita who appeared in The Karate Kid (1984), The Karate Kid Part II (1986), The Karate Kid Part III (1989), and The Next Karate Kid (1994). He was created by American screenwriter Robert Mark Kamen. A wise, Okinawan-born karate master, he mentors Daniel LaRusso in the first three films (1984–1989) and Julie Pierce in the fourth one (1994).
https://en.wikipedia.org/wiki/Mr._Miyagi