Geofront

"GeoFront" is the publicly used term to describe a massive subterranean cavity, specifically the GeoFront underneath Tokyo-3 (site of pre-Second Impact Hakone). However, unknown to the public is that the GeoFront is actually not a naturally occurring structure, but the "Black Moon" of the Angel Lilith. Also unrevealed to the public was that there was actually another GeoFront discovered in Antarctica, identical to the first: the "White Moon" of Lilith.

Notes

• "GeoFront" is a real-life term, an English word which was made in Japan. It means "underground space which the people can use for living, manufacturing, etc." Because Japan is small, research into the development of underground space has been studied there.