Suzuki Harunobu, Woman Playing the Shakuhachi, ca. 1770. Perhaps this is just an innocent depiction of a young woman playing the shakuhachi in the wintertime (notice the many layers of her robes)? Most unlikely, considering that the shakuhachi was a common phallic symbol of the time as well as this artist's vast output of eroticized imagery. The poem on it reads:

In the light of the moon,

Her idle plaything in the bedroom,

Breezy sounds

An inscription for this image identifies the woman as Katsuragi--a prostitute's name.