Godzilla vs. Gigan

This was the first film in which Godzilla visibly bleeds, despite being made for children as part of Toho's Champion Festival. The series' original special effect director Eiji Tsuburaya deliberately kept blood and gore to a minimum in his films, reasoning that they are meant for children and families to enjoy. Following Tsuburaya's passing in 1970, the remainder of the special effect team had no qualms about depicting bloodshed. This was not unusual for children's media in Japan at the time, with many contemporary superhero shows having monsters frequently being dismembered or blown up. The effects crew were actually inspired to make the fights bloodier because they received fan requests from children who asked why didn't the monsters bleed, so the crew obliged to appease them.

Due to stock footage from earlier movies being used, the appearances of Godzilla, Ghidorah, and Anguirus keep changing.

In the opening credits of the Japanese version, colorful lasers shoot from different directions, and pop up into strips within which each credit appears in white text. In the English versions, only the sound FX of the lasers are heard (standard text credits were used).

For the scenes of Godzilla and Angilas talking to each other, word balloons are used in the Japanese version, but Toho's international English version (used for Cinema Shares' edited US print titled "Godzilla on Monster Island"), uses actual English dialogue.

Edited from Sora no daikaijû Radon (1956)