Authentic Edo period original (c.1840) Japanese erotic art shunga woodblock print picture by an artist of the Utagawa School.  Shunga picture measures 21 cm x 17.7 cm.  Very good colors and impressions.  Condition is fair+/decent with some wear, soiling, missing edges at bottom sides.  No backing.  Please see and judge from photos.
 
An interesting shunga scene of couple having intercourse on a pleasure boat, while being ferried away from some angry-looking ruffians on shore.