"So, the microwave antenna at the summit of Mount Kajika is turned into a mirror in readiness for Operation Rear View Mirror. Hundreds of workmen are employed, treating everything that holds the mirrors in place with a mercury preparation. At the same time, action is being taken to keep Barugon in one spot. Preparations for Operation Rear View Mirror have been completed. The ground force is making use of all its most advanced weapons in the attack against Barugon. It is hoped that in this way, Barugon will be angered. He will respond by sending out his most powerful weapon - the rainbow."
January 1, 1970
https://en.wikiquote.org/wiki/Gamera_vs._Barugon