Authentic Edo period original, c.1837, Japanese erotic art shunga woodblock print picture book by Kuniyoshi Utagawa (1797-1861).
 
From his series, Shunshoku irifune cho (c.1837).
 
Shunga book measures approximately 22 cm x 15 cm (closed). 
 
Condition is fair/worn with obvious cover wear, soiling, ink added to some pictures, rubbing, and overall general wear with age.  Please see and judge from photos provided.  All of the book artwork is shown here.  The remaining pages are kanji text pages.
 
A fairly well-known shunga series for its 'hairy man' villain.  A couple is lost outside at night in inclement weather with the male partner being unwell.  A stranger appears and offers them accommodation for the night, only to abuse the weakened male, while physically overcoming his female partner.