According to legend, Watanabe no Tsuna was challenged by a friend to spend the night at the Hojo Temple in Kyoto where he could have an encounter with the only demon left in Japan. Disturbed in the middle of the night, he flailed wildly with his sword, cutting off the arm of the awful Ibaraki, the Demon of Rashomon. Later as Watanabe performs Shinto rights over the arm, Ibaraki returns disguised as his elderly aunt, retrieves the arm, and flies away.