GlossaryPaper napkin
A napkin made out of paper.
In the story, the paper napkin is what the stranger used to make the paper crane. He folded the paper to look like the bird.
This pictures is of a paper napkin similar to the napkin the stranger folds into the magic crane.http://www.hotelmanagementtutorial.com/wp-content/uploads/2012/10/Paper-Napkin.jpg