Authenticity is uncertain. Yoshio Ōishi (Ōishi Yoshitaka, 1659 - March 20, 1703) was a samurai of the early to mid-Edo period. He was the chief retainer of the Ako Domain in Harima Province. His common name was Kuranosuke [1]. He is often referred to as Ōishi Kuranosuke, from his official title. He is known as the leader of the Forty-Seven Rōnin of the Ako incident, which occurred in the mid-Edo period, and became famous through the puppet theater and Kabuki play "Kanadehon Chūshingura" based on this event. In the works of Chūshingura, he is known by the name "Ōboshi Yuranosuke" [2].