These weapons were first introduced in the anime, shown in the possession of Raiga Kurosuki. Ultimately, both were left behind at the bottom of a river in the Land of Rivers, after Raiga's death. The swords are later adapted into the manga, where they are acquired by Kabuto Yakushi and given to the reincarnated Mangetsu Hōzuki, who stored them within a scroll an later returned them to a similarly reincarnated Ameyuri Ringo, both of whom are previous wielders of the blades. In the anime, after being trapped in a bottomless marsh, Ameyuri gives the blades to Omoi as a thank-you gift from their battle.