Authentic Edo period original, 1854, Japanese erotic art DELUXE shunga woodblock print picture by Koikawa Shozan (1821-1907).  From his shunga series, Shaka hassho zoku yamato bunko, published and dated 1854.  Shunga picture measures 12 cm x 18 cm.  Excellent colors and impressions! Also some deluxe printing techniques such as gauffrage, urushi-e, which is a type of black lacquer, and mica (metallic pigments).  Condition is very good with some light wear and soiling.  Please see and judge from photos. 
 
A fantastic original deluxe shunga woodblock print picture by Koikawa Shozan!  In this shunga scene, two female voyeurs masturbate while eavesdropping on the occupants in the adjacent room.