Post your Kaiju related trivia here.

I will start with some trivia related to the movie Matango (1963):

The giant mushrooms that the characters eat were created by the special effects crew from rice pastry. The rice pastry would be picked up from a nearby shop that specialized in it, and taken to the studio where it was shaped and cooked. Because Kumi Mizuno was so well liked, they would add sugar and other flavors.

The film was nearly banned in Japan due to the fact that the makeup that some of the cast wore as they were turning into mushrooms was very reminiscent of how many people looked after the atomic bombing of Hiroshima and Nagasaki.

Ever wonder why Jiras from Ultraman looks so much like Gojira, but with that goofy fin? Tsuburaya started his own production company, while still working for Toho. He brought over some Gojira costumes, and used the head from one movie, and the body from another. There was a gap in the pieces, so they added the fin.