"As we've now learned, in regards to the monster's strange powers, his deadly ray is based on ultra high frequency waves which it uses to produce heat. Up to now we've been defenseless, now we are reminded that this transceiver emits waves just like the creature does, but their frequency is lower, opposite to it, therefore this characteristic of the transceiver tends to weaken the monster, just as tropical people become weak when they go to a northern cooler climate, and Eskimos react the same way to a warmer southern climate."
January 1, 1970
https://en.wikiquote.org/wiki/Gamera_vs._Jiger