Koyakko (小奴) was a talented dancer in the Shinbashi geisha district of Tokyo. After the Great Kanto Earthquake of 1923 she succeeded to the professional name of Hanayagi Sumi (花柳寿美) and went on to modernize traditional dance-drama. A motion picture was later made of her career.
From left to right: Ichiha, Komako, Ibu - from Ichikoma Okiya, Anjo (Aichi prefecture)
The Geisha on the right is Eve (Ibu/一舞), a real blonde geisha. Her onesan is Ichiha. Eve is originally from the Ukraine and, according to her okaa-san, is quite dedicated to learning the arts. (text source)
Uchiwa (round fans) were introduced to Japan from China many centuries ago. They are made by stretching paper or silk, often decorated with calligraphy or ukiyo-e (floating world) scenes, over a radiating bamboo skeleton. Uchiwa is a kigo (seasonal word) for summer in Japanese poetry.