Authentic Edo period original, c.1842, Japanese erotic art deluxe shunga woodblock print by Kunisada Utagawa (1786-1865).  From the shunga series, Shiki no sugatami  (Viewing Forms in the Four Seasons).  Shunga picture measures 22.2 cm x 15.3 cm.  Excellent colors and impressions!  Rich in colors, urushi-e (black lacquer), gauffrage (on the paper lantern), and also gold mica (metallic pigments).  Condition is good with some wear at bottom right border and soiling.  No backing.  Please see and judge from photos.
 
A superb deluxe shunga woodblock print picture of a couple out at night, traversing a bridge in the rain.