Authentic Edo period original, c.1838, Japanese erotic art shunga woodblock print picture by Kuniyoshi Utagawa (1797-1861).  From his shunga series, Edo nishiki-e azuma bunko (Edo Brocades, the Eastern Library).  Shunga picture measures approximately 24.4 cm x 16.6 cm.  Very good colors and impressions, as well as some gauffrage on parts of the vagina.  Condition is very good with very little wear to note of.  No backing.  Please see and judge from photos provided.
 
Japanese original shunga woodblock print piece detailing the inside of the vagina during intercourse - quite a fantastic & rare scene!