Thread:GodzillaIsland7.2/@comment-3367060-20140703051759/@comment-25172205-20141101231735

I may have some more info on this thing's name. It is featured on a page in the Toho Special Effects All Monsters Encyclopedia which, as it's name entails, is an encyclopedia of every single one of Toho's monsters.

It looks to me as the thing's name is: "トレンディル星の古代生初" in Japanese, but I am unsure.

Here is the page if you want to look at it and see if you can see the symbols correctly (bottom right):