Ideas of other Toho Kaiju

Yo! What's up fellow G-fans!

I am currently working on an essay where I am analyzing Gojira (1954) and emphasizing on how Godzilla was a metaphore for the post-WWII propaganda in Japan. But I was wondering if anyone here knows if any other Toho kaiju had some sort of metaphor behind their character?

My classmate who peer reviewed my essay was curious about that and thought if there was any sort of evidence, it would be a good point to add. He was thinking maybe the concept of kaiju vs kaiju was influenced by battles in WWII. Maybe like in the Showa series where Godzilla is the good guy, Godzilla represents Japan and the opposing monster is US (or any of the other Allies). I don't know, it sounds kind of complicated. It may not even have anything to do with being a metaphore for something, but I think any thought would help.

Thanks guys!