Authentic Edo period original, 1842, Japanese antique erotic art shunga woodblock print picture by Kunisada Utagawa (1786-1865).  From his shunga series, Shiki no sugatami (Viewing Forms in the Four Seasons). 
 
Shunga picture measures approximately 28 cm x 22.5 cm.  Excellent colors and impressions!  Condition is very good with some light wear and soiling, most notably at bottom corners.  No backing.  Please see and judge from photos.
 
A superb antique shunga woodblock print picture of an impatient man coercing his female partner into some late night action.  This is also a variant from the same series.  The other version of it (in a Japanese traditional garden) can be found here.