HALF-MAN, HALF-MONSTER!
An American journalist stationed in Japan is given a mysterious injection by a mad scientist, turning him into a homicidal, two-headed monster.
HALF-MAN, HALF-MONSTER!
An American journalist stationed in Japan is given a mysterious injection by a mad scientist, turning him into a homicidal, two-headed monster.
Of course I had to go with this particular poster instead of the single credit one: this is /c/bmoviebonanza after all. The A movie in that double bill is also known as Eyes Without a Face btw, which is a genuinely great movie.
A few more screens: