Trivia: Gamera: Guardian of the Universe
- Dueling Dubs: Britain got a very different dub of the film, with a bitchin' techno soundtrack to boot. You can hear a snippet of it here: http://youtu.be/kr0Zy8Z2vT8?t=1m45s
- Hey, It's That Guy!: The captain of the plutonium tanker is played by Akira Kubo, and the captain of the other ship is played by Kojiro Hongo. Not only that, but Shinobu Nakayama, who plays Nagamine, had a small role two years earlier in Godzilla vs. Mechagodzilla II, although it was more of an appear-in-one-or-two-scenes-and-be-forgotten-about role.
- Hey, It's That Voice!: In the ADV English Dub, Nagamine has the same voice as Asuka, and one of her colleagues has the same voice as Shinji.
- What Could Have Been: Barugon was considered by the film makers to be Gamera's opponent in this film before Gyaos was ultimately chosen.