1967/20: Gamera vs. Gyaos 1967

Trailer:

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https://dai.ly/x9bbpok

https://en.wikipedia.org/wiki/Gamera_vs._Gyaos

https://www.moriareviews.com/sciencefiction/gamera-vs-gyaos-1967.htm 

http://www.1000misspenthours.com/reviews/reviewse-g/gameravsgaos.htm 

https://talkfilmsociety.com/columns/saturday-afternoon-kaiju-gamera-vs-gyaos