Masaru Aso was the lab assistant of geneticist Doctor Mochizuki, used as one of his experiments related the creation of the Neo Organism, enabling him to transform into a grasshopper-like being called Kamen Rider ZO. He fled into the mountainside and went into a coma before he was awakened by a telepathic call two years later with an unconscious urge to protect Hiroshi Mochizuki, the son of Doctor Mochizuki.
- Genre: Action, Adventure, Science Fiction
- Studio: Ishimori Productions, Toei Company
- Keyword: monster, superhero, super power, child protection, tokusatsu, kamen rider
- Cast: Hiroshi Tsuchikado, Isao Sasaki, Shohei Shibata, Hiroshi Inuzuka, Naomi Morinaga, Kenji Ohba
