Gigant

Gigant ギガント (Giganto) is an unmade extraterrestrial spider from the unmade 1966 Nikkatsu film, Giant Monster Gigant.

Appearance
Gigant was a giant extraterrestrial spider-like creature.

Giant Monster Gigant
A giant alien lifeform resembling a spider arrives on Earth and causes destruction.

Gigant was ultimately replaced by Gappa, the Triphibian Monster.