The Watchers and the Watched, Edo period (1615?1868), 1764?72, Japan, Polychrome woodblock print; ink and color on paper, H. 11 1/8 in. (28. 3 cm) ; W. 8 1/4 in. (21 cm), Prints, Suzuki Harunobu (Japanese, 1725?1770), Harunobu, who is credited with the introduction of the polychrome print, also depicts courtesans on display in a Yoshiwara teahouse, but there is considerable difference in his treatment of the subject