TV  commissioned this new monster movie from Toho Studios. The studio  intially believed it would only be shown on American TV, and thus  ordered the movie shot in black and white at a standard aspect  ratio. Almost halfway through shooting, the studios changed their  mind and decided the film would indeed be shown in Japanese  theaters. This meant that the rest of the movie had to be shot in  the anamorphic format of Tohoscope, while the footage that was  already shot had its tops and bottoms cropped in order to resemble  Tohoscope.