In the AIP version of this film, its entire cast is mysteriously uncredited.
On the original Japanese trailer for this film, director Yoshimitsu Banno's name is given as "Yoshimitsu Sakano." In the Japanese version, as well as in Toho's own English version, he is credited properly as "Yoshimitsu Banno." The American International Pictures version credits him as "Yoshimitu Banno."
Special effects director Teruyoshi Nakano's name is incorrectly rendered as "Shokei Nakano" in both of the English versions of this film. Nakano has also been credited as "Akiyoshi Nakano" in other Toho films.