Photon Power (光子力 | Koushiryoku) is a fictional energy source that is the main power source for the Mazinger Z and other related robots.

Mazinger Z and Great Mazinger, super robots powered by Photonic Energy.
History[]
Professor Juzo Kabuto's expedition within Mt. Fuji led him not only to Japanium but in the volcanic area, nuclear fission from the elements within Japanium gave rise to a new kind of energy. The professor researched this energy noting the large amount of photons and how it gave off no pollution. The professor managed to reverse engineer the nuclear fission process that brought in a new energy revolution, surpassing nuclear power. The professor dubbed this new energy as Photon Power.
With Dr. Hell's threat coming into fruition, Juzo continued his research developing the Photon Power Engine for the Mazinger Z's power supply. The Photon Power makes up most of the Mazinger's features such as the Koushiryoku Beam and Photon Power Rockets.