Gamera 2: Advent of Legion

Original title: ガメラ2 レギオン襲来

“Who will be extinct, Japan, or Legion?”

A strange meteor lands in Japan and unleashes hundreds of insect-like "Legion" creatures bent on colonizing the Earth. When the military fails to control the situation, Gamera shows up to deal with the ever-evolving space adversary. However the battle may result in Gamera losing his bond with both Asagi and humanity.