- Yumi Kameyama is the second known suit actress to portray a kaiju in a film, and the first to portray a daikaiju in a film. Mayumi Aguni had played the human-sized Liliput a little over three years earlier in the 1991 film Zeiram.
- According to special effects director Shinji Higuchi, a woman was chosen to portray Super Gyaos because "the shape of a woman's body is different from that of a man's" and "since virtually all of the people who work in the special effects field are men, I thought that I could make it a little easier for women to enter the field by having one play Gyaos." *Kameyama was also cast because the designers wanted the monster to have a feminine image.:25 However, Kameyama actually wanted to play Gamera because her family name contains the Chinese character for "turtle" (亀. Kame):173
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