Authentic Edo period, c.1857 original Japanese erotic art shunga woodblock print picture by Koikawa Shozan (1821-1907).  Shunga picture measures 18.2 cm x 10.8 cm.  Excellent colors and impressions!  Very good condition.  No backing, aside from a few tiny remnants.  Please refer to photos.  
 
A rare & superb Japanese original shunga woodblock print picture detailing the insides of the vagina as it's ejaculating, while being penetrated by an erect phallus.  Also a close-up of the Japanese beauty's face, clearly in intense rapture!