Kamen Rider 0

Kamen Rider 0 (仮面ライダー０号) is a term first used by Toei producer Tohru Hirayama refers to a prototype of Kamen Rider 1 made by Professor Midorikawa, however, the title "Kamen Rider 0" was using to describe various "reboot" projects during Showa era by his colleagues and successors.

Riders who had "Kamen Rider 0" Title

 * Kamen Rider 0
 * Skyrider
 * Kamen Rider Black
 * Kamen Rider Shin