Alternate Character Interpretation: Is Godzilla really such a bad guy in the film? When Godzilla awakens, he goes THROUGH Nagoya, but in no way destroys it. All the destruction Godzilla inflicts is caused by his clumsiness (his tail hits a gas tank startling him into firing his ray, his tail gets caught in Nagoya Castle and manages to knock it over dislodging it, he trips and falls into Nagoya Castle then smashes it in a fit of rage). If the removed U.S. version-only scene is to be taken into account, Godzilla may have been making a bee-line for the Pacific, at which point he is turned away by the blasts of the Frontier Missiles. Then, Godzilla spends the rest of the film loitering about on the Kanto Plain, where he is continually attacked by the self-defense forces for no real reason whatsoever.
Misaimed Marketing: The US dub renamed the film as "Godzilla Vs. The Thing" and the promotional art tried to portray the monster Godzilla would duel as a tentacled horror so terrifying, that the poster art had to be censored and the only way to see how horrifying it was was to see the movie. Never mind that Mothra, who isn't remotely scary, is a good natured monster!
Some Anvils Need to Be Dropped: The whole sequence on Infant Island, where the human protagonists ponder the horrors of nuclear testing and atomic war. Hamfisted? Undoubtedly. An important moral in the heart of the Cold War? Indubitably.
The skeleton on Infant Island with the bobbing head.
The compositing on the Shobijin is uneven, with the two borderline transparent in several scenes.
The close of of Mothra's attack on Godzilla at one point looks like it was either over-cranked or stop motion.
While intentional, the wobbly muzzle of the Mosugoji suit used after the castle destruction (itself a behind the scenes effects failure) can be a bit off putting.
Ugly Cute: Mothra is a giant fuzzy squealing bug, yet one of the most endearing characters of the franchise. Part of it might be the contrast with Godzilla, who's straight-up ugly, though in the badass way.