* Chances are the Fire Rat Robe in ''InuYasha'' is unique; it is based on one of the treasures from "The Bamboo Cutter's Tale" (''Taketori no Monogatari''), the oldest known literary work in Japanese. In order to avoid unwanted marriages, Kaguya-hime demanded that her suitors perform impossible tasks, such as bringing to her the Buddha's begging bowl, the Dragon King's jeweled necklace, or a robe made from the ''fur of the Chinese fire-rats''
** Which was actually brought up in [[TheMovie the second movie]].