Fukuiraptor, meaning "thief of Fukui," was a megaraptoran theropod dinosaur of medium size that inhabited the Early Cretaceous period, likely during either the Barremian or Aptian age, in what is now Japan. Its remains have been recovered from the Kitadani Formation and possibly the Sebayashi Formation. The primary specimen, serving as the type, consists of a partial skeleton uncovered in the Kitadani quarry near Katsuyama, located in the Fukui prefecture. Notably, this specimen is believed to represent an immature individual, suggesting that an adult Fukuiraptor might have been larger. Additional fossils attributed to this species, including numerous humeri, femurs, and teeth, have been found in the same quarry.

Despite its age and maturity, Fukuiraptor exhibited relatively slender proportions. In 2010, it was estimated to have measured around 5 meters (approximately 16 feet) in length and weighed about 300 kilograms (roughly 660 pounds). One of Fukuiraptor's distinguishing features is its unique teeth, which share characteristics with both carcharodontosaurids, notably their compressed and blade-like shape with wrinkled enamel, and tyrannosaurids, displaying oblique blood grooves adjacent to serrations.

Furthermore, the holotype of Fukuiraptor possessed notably large and flat manual unguals, or hand claws. Initially, these hand claws led to misclassifications as a dromaeosaurid due to confusion with foot claws. However, it has since been correctly reclassified as a megaraptoran.