* HeyItsThatGuy: Yasuko Sawaguchi, the actress who played Naoko in ''Film/TheReturnOfGodzilla'', portrays Erika Shiragami here.
** Former JPop singer Yoshiko Hidaka who also starred in BlackRain has a role in the film.
* WhatCouldHaveBeen: The final product was different from the original script. For example, instead of Godzilla's first fight with Biollante, Godzilla would fight a rat/fish hybrid called Deutalios. Godzilla would gobble him up, proving once and for all the King of the Monsters has a taste for meat. In another ending, a losing Biollante would have tried to kill Godzilla by turning into a wave of pure energy.