License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Katsushika Hokusai. Poem by Gon-chūnagon Masafusa (Ōe no Masafusa), from the series One Hundred Poems Explained by the Nurse (Hyakunin isshu uba ga etoki), 1921. The Metropolitan Museum of Art.