In an effort to find an economic means of purifying salt water, a joint U.S.-Japanese military command is set up on an isolated Japanese island where an unusual salt water lake is situated. However, their purifying experiments arouse the prehistoric monster Obaki from hibernation at the lake's bottom, and it proceeds to attack Japan. Although made by a U.S. independent film company, this film was based on a Japanese Toho monster film of 1958, "Daikaiju Varan", from which all of the monster effects scenes and a few incidental dramatic shots were edited into it.
Myron Healey
as Cmdr. James Bradley
Tsuruko Kobayashi
as Anna
Clifford Kawada
as Capt. Kishi
Derick Shimatsu
as Matsu, the boy
千田是也
as Dr. Sugimoto
野村浩三
as Paul Isoh
Ayumi Sonoda
as Shidori Isoh
Fumito Matsuo
as Paul's Friend
平田昭彦
as Dr. Fujimora
村上冬樹
as Dr. Majima
土屋嘉男
as Military Officer Katsumoto
山田巳之助
as Secretary of Defense
