盛装の歌川（後姿） : モノクロ写真でよみがえる花魁の世界 - NAVER まとめ
Yoshitaka Amano I have a book of his art with this cover !!!
VINTAGE OIRAN ET SES APPRENTIES
Oiran (by Naomi no Kimono Asobi)
tayuu and kamuro from behind 1920s by blue ruin1, via flickr
The middle one is called a tayu, which is the highest rank of oiran/courtesan, these are cultered and refined prostitiues. Tayu are the only ones who wore those towering shoes. Next to her are kamuro, "Child attendents" they were her apprentices.
朧月象ヲ也 Oboro Tsukiyou o Nari
Courtesan. Hanging scroll; ink and color on paper. About 1870,s, Japan. by artist Utagawa Yoshimori. MFA. William Sturgis Bigelow Collection