One of the recurring themes of the show Gekko Kamen was that no one knew the titular hero's real identity, not even the audience (A theme similar to the American western hero The Lone Ranger). However, smart viewers would often notice that police detective Juro Iwai (祝 十郎 Iwai Juro?) would disappear whenever trouble arose. This led them to suspect that the detective was Gekko Kamen, a fact that was further hinted upon in later media appearances.