Authentic Edo period original, c.1845, Japanese erotic art shunga woodblock print picture by Keisai EISEN (1790-1848).  From the shunga series, Harujo Sumida Hakkei (Eight Views of Sumida in Spring).  Shunga picture measures 18 cm x 12 cm.  Very good colors and impressions, as well as in very good condition with just some light wear & soiling.  No backing.  Please see and judge from photos.
 
A great original shunga woodblock print picture of a couple having intercourse at night under a partially covered full moon.  The female lover pulls tightly on her male lover's arm while climaxing.