Although director Kensho Yamashita and screenwriter Hiroshi Kashiwabara had more experience in producing teen idol movies, they were not newcomers to the kaiju genre, having both assumed minor roles in the making of "Terror of Mechagodzilla". The two decided early in production to make the film more lighthearted than its predecessors and more focused on character development, centering it on Megumi Odaka's recurring character Miki Saegusa, who had previously played marginal roles in the series. The emphasis on lightheartedness was such that a scene depicting Godzilla desperately trying to rescue his son from SpaceGodzilla's crystal prison was deleted on account of its seriousness, a move disapproved of by Godzilla suit actor Kenpachiro Satsuma.