The ShodaiKongu appears to have been adapted from the Snowman suit from Half Human, now with a new more gorilla-like head, gray skin, and thick brown fur over most of its body. The suit's head had several gorilla-like features, such as a large mouth lined with almost rounded teeth inside the lips, a short nose, regularly-sized eyes, and a pointy tip-of-the-head. The suit also had longer arms than legs. A puppet of Kong's upper body was used for close-ups, while a stop-motion model was used for a sequence where Godzilla drop-kicks Kong.
In 1966, the suit was loaned to Tsuburaya Productions, where it was slightly modified and used to portray the giant monkey Goro in Ultra Q. The suit was returned to Toho the very next year for the film King Kong Escapes, where it was modified to resemble the new King Kong suit and used to portray Kong in water scenes.
- This was the first King Kong design to be a suit. Kong would be portrayed by an actor in a suit for the next three films he appeared in; King Kong Escapes, King Kong (1976), and King Kong Lives.