watch 01:52 The Loop (TV) Do you like this video? This article is about a/an actor in Kamen Rider Den-O. Hideo Ishiguro (石黒 英雄, Ishiguro Hideo) played Kai in Kamen Rider Den-O. Later he played Gai Kurenai, the main protagonist of Ultraman Orb. Retrieved from "https://kamenrider.fandom.com/wiki/Hideo_Ishiguro?oldid=409199" Categories: Kamen Rider Den-O Actors Actors who appeared in Ultraman Actors who appeared in J Drama Community content is available under CC-BY-SA unless otherwise noted.