Frankenstein vs. Baragon (フランケンシュタイン対地底怪獣バラゴン Furankenshutain tai Baragon, lit. Frankenstein vs. the Subterranean Monster)[a] is a 1965 tokusatsu kaiju film co-produced by Toho and UPA.[b] It was released to Japanese theaters on August 8, 1965 and to American theaters on July 8, 1966. In 1945, Hitler's Nazis seized the immortal heart of Frankenstein's monster and handed it over to the Japanese, who kept it in a military hospital in Hiroshima. The heart was lost when the atom bomb leveled the city, but 15 years later a wild boy is discovered by Dr. James Bowen and his assistants Sueko Togami and Kenichiro Kawaji. They conclude this boy has regenerated from the irradiated heart of Frankenstein, and witness him grow to gigantic size the more they feed him. Frankenstein escapes, and is soon blamed for several disasters occurring throughout Japan. However, Togami and Bowen believe these to be caused by a separate creature, the subterranean monster Baragon. Now, the scientists work to prove Frankenstein's innocence while Frankenstein must fight to save them from Baragon.