Authentic Edo period original, Bunsei era, 5th year, 1822, Japanese shunga erotic art woodblock print by TOYOKUNI I (1769-1825).  From his series, Ooyogari no koe. 
Shunga picture measures 27.2 cm x 22.4 cm.  Good colors and impressions.  Condition is good with some wear and soiling, couple tiny spots of wormage.  No backing.  Please see and judge from photos.
 
A man and woman flirting underneath the blankets while riding in a pleasure boat.  She covers her face out of modesty.