Gamera's role as a guardian of children came from director Noriaki Yuasa's own traumatic experiences growing up as a child during WWII. He mentioned that all the adults and teachers he knew would constantly implant to him the importance of nationalism and Imperial Japan's ambitions, only to abandon it all after Japan's defeat. He recounted the story of how of a teacher of his switched from being a outspoken Nationalist into an advocating Communist. Yuasa had also been a child actor and the behavior he witnessed from them lead him to develop a disapproval of actors in general. These sentiments were carried into the making of Gamera, which Yuasa conceived as the only entity children could have faith in.
This was the final kaiju movie to be filmed in black & white.
This is the only film in the series in which Gamera does not fight another monster.
This is the only film in the series with Gamera as the antagonist.
This is the only film in the Gamera series that was filmed in black and white.