The Kutune Shirka (Ainu: クツ゚ネシㇼカ), known in Japanese as Itadorimaru no Kyoku (虎杖丸の曲) or simply Itadorimaru (虎杖丸), is a sacred yukar epic of the native Ainu people of Japan. The Ainu title refers to a magic sword wielded by the story's protagonist. It is one of the most important, if not the most important, piece of Ainu literature. There have been several translation efforts since its compilation, into Japanese and other languages.