Animation has an affinity with shape-shifting, to the point that even saying this is cliché. Since one of the first theoretical texts on animation, Serguei Eisenstein’s Notes on Walt Disney, the ability for objects to change forms at will has always been considered essential to the medium. That’s what Eisenstein called “plasmaticness”: the fact that animated objects and characters aren’t made of real matter, but rather of a sort of “plasma” that’s perpetually open to alteration. This is why animation has always been understood through the lenses of fairy tales, fantasies and phantasmagories.
During the 60's, Tokyo Movie, still a small studio, laid low and only produced one new show in 1967, the SF-manga adaptation Perman. But they were working hard behind the scenes and made their first two historical moves : overseeing the creation of a new studio, A Production ; and a new revolutionary anime in 1968, Star of the Giants.