Jūzō Kabuto, a visionary robotics engineer and scientist, gained renown for unearthing Japanium—a rare mineral beneath Mount Fuji capable of producing immense Photon Energy—and forging Super-Alloy Z, a nearly impervious metal. As the Kabuto family patriarch, he dedicated himself to raising his grandchildren, Kōji and Shirō, following their parents’ disappearance. Initially collaborating with Dr. Hell, Jūzō severed their alliance upon uncovering the destructive potential of the Kedora parasites, prompting him to design Mazinger Z, a towering robot engineered to safeguard humanity from Hell’s schemes.

When Dr. Hell and Baron Ashura launched a devastating assault, Jūzō secured Kōji’s escape by transferring control of Mazinger Z through the Pilder cockpit system, meeting his end to ensure his grandson’s survival. This sacrifice galvanized Kōji’s determination to confront Hell’s forces. Beyond his death, Jūzō’s influence endured through clandestine networks like the Kurogane House, a family-linked spa overseen by Tsubasa Nishikiori, which offered vital aid to Kōji and Shirō while guarding Kabuto lineage secrets.

Decades later, Jūzō’s son Kenzo resurfaced, having survived apparent demise only to be ensnared by a Kedora-infested prosthetic. After severing the corrupted limb, Kenzo exposed the looming Mycenae Empire invasion, aligning with Jūzō’s prescient warnings of threats surpassing Dr. Hell. Jūzō’s mechanical innovations—Mazinger Z, Great Mazinger, and Mazinkaiser—remained foundational in countering these existential dangers.

Alternate timelines reimagine Jūzō as a scarred, power-hungry genius or a secluded survivor advancing his robotic arsenal. Yet within *Mazinger Edition Z: The Impact!*, his core identity persists: a brilliant inventor opposing Hell’s tyranny, bound by familial duty to empower future generations through science and sacrifice.