Suit actors Mizuho Yoshida (Godzilla) and Rie Ôta (Baragon) would frequently "roar" when inside their suits during filming. Rie Ôta also happens to be the first female suit actor in the Godzilla series.
In the opening scene, Admiral Tachibana (Ryûdô Uzaki) lectures his troops on the incident from Godzilla (1954), and notes that "a monster similar to Godzilla ravaged New York at the end of the last century." This was a reference (and jab) to Godzilla (1998), the oft-disparaged Hollywood remake. Audiences in Japan both laughed and cheered at this scene.
Some of the Yokohama miniature sets from this film were used in Quentin Tarantino's Kill Bill: Volume I (2003). They were supplied for him by art director Toshio Miike.
Disappointed that Varan, one of his favorite monsters, was scrapped from the project, monster designer Fuyuki Shinada compromised by putting Varan's facial features on King Ghidorah's three heads.
Is the first film and the only time where King Ghidorah is a "hero" character.
Takehiro Murata: Jet fighter pilot. Murata has had roles in numerous Godzilla films, including the lead role in Godzilla 2000 (1999) ("Godzilla 2000").
Mizuho Yoshida: The pink-shirted young man (wearing a black baseball cap) standing behind the twin teenage girls in Yokohama when Mothra flies over the area. Yoshida is also the stuntman playing Godzilla.
Akira Ohashi: The thin, short-haired man in the Yaizu Harbor office who witnesses Godzilla rising out of the harbor (See also 'Rie 'ta'). Ohashi is also the stuntman playing King Ghidorah.