Authentic Edo period original, c.1770, Japanese erotic art shunga woodblock print picture book by Isoda Koryusai.  Title of book is Imayo fuzoku Kojodangobashira.  Shunga picture book measures 15.5 cm x 21.5 cm closed.  Very good impressions and good condition with some wear and soiling; a few pages show a bit of ink marking.  All pictures are shown here (17 total picture pages) with remaining pages being kanji text pages.  Please see and judge from photos.
 
A very rare and fantastic original Koryusai shunga picture book from the latter 1700s! 
 
To see other great Koryusai shunga artwork, please click here.