Kisan no Taiken(揮散の大圏, Great Spheres of Vaporization) is a mechanism that "Seeking Researcher" Dantalion created and incorporated as an upgrade of Crystallization of Self-Research Excellent 252580(我学の結晶エクセレント252580Gagaku no Kesshō Ekuserento 252580), Kiken no Kentō, in some of his series of robots known as Iron Giants. Thus, it is considered part of Dantalion's Crystallization of Self-Research(我学の結晶Gagaku no Kesshō) series. Upgraded robots may sometimes be referred to as the name of the mechanism.