アイアンキング
is a television genre in tokusatsu that involves Japanese superheroes or robots either with the ability to grow to immense heights to fight giant monsters or who are originally giant as a part of their lives. The Kyodai Hero is the mainstream superhero genre that is widely popular in Japan. The first and most famous Kyodai hero is Ultraman who made his debut in 1966. Since then, Ultraman has helped spawn the Kyodai hero genre with countless shows, franchises and films such as "Go! Godman" and "Iron King".