Iron Comb Mask was the leader of the construction of a volcano-like device in an underground base hidden beneath Tokyo with the plan to use it to burn the city to the ground in a massive eruption. Holding the scientist who helped develop the idea hostage, he gains the notice of the Gorengers after one of the workers becomes killed trying to abduct his daughter as a hostage to cooperate with the Black Cross, then another escaping worker becomes murdered slightly after. Using a disguise, Kaijo infiltrates the base as a worker while placing a tracker for the other Gorengers to scope the base using Variblune and discover where their leader was. However Iron Comb Mask caught on and captured Kaijo, locking him in the same cell as the scientist where he affirmed that he was doing this for his dau