This card's Japanese name, "Superheavy Demon Beast Kyu-B" (超重魔獣キュウ-B Chōjū Majū Kyū-Bī) is a pun on "Kyūbi" (九尾), a nine-tailed fox spirit also known as the "Kyūbi no Kitsune" (九尾の狐) in Japanese folklore.
This card's Level (9) and effect to increase its DEF by 900 is a reference to its name, as "Kyu" is the Japanese word for the number "9".