Juzo Kabuto is the name of the grandfather of the main protagonist Koji Kabuto and creator of the Mazinger Z robot.
- Juzo Kabuto (Manga): The most recognizable megalomanical scientist with a scarred left eye who created the Mazinger Z robot.
- Juzo Kabuto (TV): The more mellow character from the anime and TV Magazine manga.
- Juzo Kabuto (Kaiser): The still living but in hiding version who created Z, Great, and Mazinkaiser.
- Juzo Kabuto (Angels): The creator of Iron Z and a friend of Daemon Abashiri.
- Juzo Kabuto (Shin): Creator of Mazinger Z who modified the arm of Zeus to equip to it.
- Juzo Kabuto (ZERO): The more maniacal and homicidal version from Shin Mazinger ZERO.