Instead of creating a new roar, the crew simply played the original Godzilla roar over loud speakers and recorded the audio.
The "Minus One" refers to the fact that Japan had already been devastated by WWII (brought down to zero), but with the emergence of Godzilla, it puts Japan into the negative. This is reflected in the film's original Japanese tagline, which translates to, "Postwar Japan. From Zero to Minus."
Gareth Edwards, director of Godzilla (2014), attended a screening of the film and described a feeling of jealousy while watching it, stating, "This is what a Godzilla movie should be like."
The film is not only the first Godzilla film to be nominated for an Academy Award but also the first Godzilla film to win. It is also the first Japanese film and the first Asian film to be nominated and to win in the Best Visual Effects category.
Takashi Yamazaki met Steven Spielberg, who told him that he saw the film three times. According to Yamazaki, Spielberg first saw it at home then went to go see it two more times in theaters. Yamazaki compared this to being praised by God since Spielberg was one of his greatest inspirations. Coincidentally, Spielberg himself is also a longtime admirer of the original Godzilla, also citing it as one of his own influences.