Authentic Edo period original, c.1828, Japanese shunga erotic art woodblock print by Kunisada Utagawa (1786-1865).  From his shunga series, Chochidori (Butterflies and Plovers).  Shunga picture measures 28 cm x 22 cm.  Very good colors and impressions.  Condition is decent+/good with some wear and soiling, wormage.  No backing.  Please see and judge from photos. 
 
A very rare shunga scene depicting two men having anal intercourse.   On top is what appears to be an older monk who is penetrating a younger male onnagata (kabuki actors who played female roles).  
 
For more information on homosexuality during feudal era Japan and the concurrent evolution of nanshoku please click here.