List of enemy  

     The Ultraman series used various monster costumes, known as kaiju in Japan, prior to other series such as Kamen Rider and Himitsu Sentai Gorenger. The principals were played by famous stunt actor Haruo Nakajima, who operated the original Godzilla.

         Often costumes of famous monster like Godzilla and Baragon would be recycled and altered, sometimes with nothing more than spray paint and often while the actor was still inside. Nakajima equipped once that the staggering gait of some of the monsters he portrayed was due less to his acting than to the fumes he had to endure. 

          Some of the costumes could not be shown fully as his feet would then have been exposed, a necessary allowance to maintain balance in the often cumbersome outfits. Also, the expense of repairing the scale cities and landscapes used for battle scenes required economy of movement and meticulous planning.