Shirabyōshi
Shirabyōshi (白拍子) were female dancers, prominent in the Japanese Imperial Court, who performed traditional Japanese dances (the dances themselves were also called shirabyōshi). They danced dressed as men. The profession of shirabyōshi developed in the 12th century. They would perform for the nobility, and at celebrations.
They are sometimes referred to as courtesans in the English language, but that term refers to a high-class prostitute, so this is rather incorrect. By nature they were performers. Some shirabyōshi did sleep with their patrons and give birth to nobles' children, but this was not their intended purpose as entertainers.
History
Shirabyōshi came about in the late Heian period. It was a time of cultural change, so in order for some women to survive they turned to performing. After their inception, Japan experienced a shirabyōshi boom in which many women became shirabyōshi because of their popularity. A shirabyōshi was always a woman who dressed in men's attire, performing dances for the gods. The name shirabyōshi meant "white rhythm", partly because of their make-up, and because their songs were slow and rhythmic. They were required to be educated, including being able to both read and write—they were talented poets, musicians, singers, and dancers.