The species Vespa mandarinia is a very large-sized wasp with a Body length 27 - 45 mm; unbelievable, the queens reach 5.5 cms in length!
Additional this gigantic, voracious predator has a quarter-inch stinger (6.35mm)! People are usually not the Japanese giant hornet's prey, but those who have felt its sting describe the pain as excruciating and very painful. Masato Ono, an entomologist at Tamagawa University, near Tokyo, said it's "like a hot nail through my leg."
Vespa mandarinia is easily recognized by the head which is strongly widened and produced behind the compound eyes, first to fifth of gastral segments dark brown; with narrow yellow bands at the margins of the tergites, sixth segment entirely yellow.
When pursuing prey, they can fly distances of about 60 miles (96 kilometers) a day at speeds reaching 25 miles per hour.