License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Anonymous. Drawings of Old Swords from the Hachiman Temple at Kamakura: Short Sword (<i>Tanto</i>) from Akita; Sword of Yoshii Family; Doctor's Sword of Mr. Fukushima; State Sword of Mr. Matsuda, ca. 1615–1868. The Metropolitan Museum of Art.