ｄビデオスペシャル 仮面ライダー4号
Kamen Rider 4 is a web series which was released as an accompanying special to the film Super Hero Taisen GP: Kamen Rider 3. It introduced a new rider, Kamen Rider 4, who is the fourth Kamen Rider cyborg created by Shocker after Kamen Riders 1, 2, and 3. The plot goes around a time loop created by the Shocker that resets whenever someone dies, but whenever the loop resets Shocker itself somehow grows stronger and stronger. Thus, it is up to the Riders to decide whether to keep on fighting a useless battle... Or end the loops for good by sacrificing one of their own.
- Genre: Sci-fi, Action, Eventyr
- Studio: Toei Company
- Nøgleord: superhero, super power, v-cinema, superhero teamup, tokusatsu, kamen rider
- Cast: 竹内涼真, Mitsuru Matsuoka, 半田健人, 中村優一, 小林豊, 萩野崇
