CREATURE FEATURE: THE MANSTER (1959)

The Manster (双頭の殺人鬼, Sōtō no Satsujinki; "The Two-Headed Killer") is a 1959 American science-fiction horror film. Shot in Japan, it was produced by George P. Breakston and directed by Breakston and Kenneth G. Crane from a screenplay by Walter J. Sheldon. Sheldon's script was based on Breakston's story, which he originally titled The Split.
The film stars Peter Dyneley as a foreign correspondent in Japan who is given an experimental drug which causes an eye, and eventually a second head, to grow from his shoulder. Tetsu Nakamura plays the mad scientist, Dr. Suzuki, and Terri Zimmern his assistant, Tara. Jane Hylton also stars as Dyneley's wife.
The Manster was an American production filmed in Japan, using a mostly Japanese crew and a number of Japanese actors. The Manster was shot in English. The film had several working titles, including Nightmare and The Two-Headed Monster. It was photographed by David Mason and edited by Kenneth G. Crane. Shinpei Takagi handled the special effects, George Wyman played the titular monster and Hirooki Ogawa composed the soundtrack.