Who is being parodied by Onizuka? In episode 8 of Great Teacher Onizuka, who is this "Kenshiro" that Onizuka is parodying?
Onizuka is making a reference to Kenshiro from "Fist of the North Star".
In the English translation of the manga, this was added as a note.

Kenshiro's fiancée is called Yuria.