The film
Unusual volcanic activity in Japan awakens Gyaos, a bloodthirsty flying monster with the power to slice things in half with an ultrasonic ray. While scientists and the military scramble to devise a way to stop this new threat, a young boy forms an alliance with Gamera; a monster no one else seems to trust.
Synopsis from TMDB.
The name
Also in Gamera vs. Gyaos
Elsewhere on screen, Sumiko
