When a rare species of butterfly is found in a mysterious valley in Japan, a pair of entomologists go to investigate and find more. They discover Varan, a giant monster, who decides to leave the valley and head straight for Tokyo.
野村浩三
as Kenji Uozaki
Ayumi Sonoda
as Yuriko Shinjô
千田是也
as Dr. Sugimoto
平田昭彦
as Dr. Fujimora, bomb expert
村上冬樹
as Dr. Majima, Sugimoto's aide
土屋嘉男
as Military Officer Katsumoto
山田巳之助
as Secretary of Defense
伊藤久哉
as Ichiro, Yuriko's brother
田島義文
as Captain of Uranami
桐野洋雄
as Yutaka Wada
瀬良明
as Village High Priest
草間璋夫
as Military Officer Kusama
