Fukuisaurus (meaning "Fukui's Lizard") is a genus of iguanodontid dinosaur from Early-Middle Cretaceous of Fukui, Japan. It was often hunted by Fukuiraptor, the area's top predator. It lived alongside the predator, Fukuiraptor and the lumbering giant, Fukuititan. Fukuisaurus was a herbivorous small ornithopod.

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