Authentic Edo period original, c.1842, Japanese erotic art shunga woodblock print by Kunisada Utagawa (1786-1865). 
From the shunga series, Shiki no sugatami  (Viewing Forms in the Four Seasons). 
 
Shunga picture measures 25 cm x 28 cm.  Very good colors and impressions.  Condition is good with some mild wear and soiling.  No backing.  Please see and judge from photos.
 
Another excellent scene from this series as a servant carries an extravagant meal to be delivered upstairs, while a couple seemingly cannot contain themselves as they openly fornicate on the balcony in plain view.  It is uncommon to come across vertical-diptych shunga scenes in both Edo & Meiji Period Japan.