Trivia: Great Teacher Onizuka
- Dye Hard: Onizuka bleached hair testify of what he used to be and are usually considered improper for a teacher. Also Kunio,to emphasize his rebellious self, a lot like Onizuka himself.
- Dawson Casting: They're supposed to be middle school students, but they look 16.
- They're third year middle school students/ninth graders (Class 3-4 means the fourth class of third year students), meaning they're between 14 and 15. In the Tokyopop translation, however, several characters including Tomoko are inexplicably referred to as 16.
- Hey, It's That Guy!: You might recognize Kunio Murai as General Miura.
- Hey, It's That Voice!: The English voice actor for Onizuka is Steve Blum, who also did the voice acting for Spike Spiegel from Cowboy Bebop, Mugen from Samurai Champloo, Roger Smith From The Big O, and many other various voice acting roles in anime.
- Name's the Same: Mr. Sakurai, the English teacher and Mrs. Sakurai, the head of school, are not related. In the anime, Mr. Sakurai is renamed Sakurada to prevent confusion.
- Romance on the Set: The live-action actors of Onizuka and Fuyutsuki ended up together in Real Life.
- Star-Making Role: Onizuka was Wataru Takagi's breakout role as a main character.