Hitodah was a creation by Yoshimitsu Banno, after he was done directing Godzilla vs. Hedorah (1971), Banno wanted to continue the Godzilla series with another film with a message against pollution. The idea was that a starfish living in the polluted seas mutates into a giant Monster and ends up fighting Godzilla. Banno scraped it though, in favor of doing Godzilla vs. Hedorah 2 (ver. 1).

Note, the name Hitodah was not the Kajiu's real name, the creature was unnamed when the idea was scrapped. The name Hitodah originates from the word 'Hitode' which is starfish in Japanese. Also no picture or concept art of Hitodah exists, the above and below concepts were created by the Toho Kingdom and are not the original intent of director Yoshimitsu Banno.