License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Nishikawa Sukenobu 西川祐信. Picture Book of Snow, Moon, and Flowers (Ehon setsugekka) 絵本雪月花; 絵本倭文庫(えほんやまとぶんこ), 1768. The Metropolitan Museum of Art.