According to co-writer Hiroyuki Seshita, the series features some of his unused ideas he had originally planned for the Godzilla anime film trilogy by Polygon Pictures (Godzilla : La Planète des monstres (2017), Godzilla : La Ville à l'aube du combat (2018) and Godzilla : Le Dévoreur de planètes (2018)). The Godzilla trilogy was made under heavy restrictions and the creators were specifically told not to reuse many concepts from the classic films, whereas he was given more creative freedom with this series.
Guiron can briefly be heard "laughing" in a deep grumbling voice at certain points, just as he did in his debut film Gamera contre Guiron (1969).
The first animated/anime Gamera Series.
Full names of lead characters: Jun "Junichi" Ichihara, Hiroki "Boco" Wada, Douglas Ken "Brody" Osborn, and Satoru "Joe" Matsuda.