Authentic Edo period original, c.1837, Japanese shunga erotic art woodblock print picture by Kuniyoshi Utagawa (1797-1861).  From his series, Shunshoku irifune cho.  Shunga picture measures approximately 28 cm x 22.1 cm.  Very good colors and impressions.  Condition is decent+/good with some wear and soiling, wormage.  No backing. 
 
Fantastic erotic art scene of a woman riding her male lover as she gets inspired/aroused from the shunga book she's reading from.