 Because of its commercial success from King Kong vs. Godzilla, Toho  decided to release another Godzilla film in 1964, Ghidrah, the Three  Headed Monster. The Mosugoji suit, though, needed to go through some  repairs. During the filming of Godzilla vs. Mothra, the mouth had  become wobbly and would not work properly. The head had also caught  on fire, which didnt help the suit much. So the head of the  Mosugoji suit was replaced by a more sturdier design. "Mosugoji II,"  as some fans refer to the repaired suit as, also had more mobility  than the original Mosugoji.