Jirass is a fictional kaiju monster that appears in the 1966 Japanese television series "Ultraman" (Urutoraman). Known for its resemblance to the iconic Godzilla, Jirass is a dinosaur-like creature with a large frill around its neck. Unlike many other kaiju, Jirass was created by a scientist who sought to revive dinosaurs. In the series, Jirass emerges as an antagonist, causing destruction until confronted by Ultraman. The battle between Ultraman and Jirass is one of the memorable moments of the series, showcasing Ultraman's strength and heroism.