Japanese WW1 Novel (I can only assume it's a story book and there are four sections).
 
Brown soft cover with a woman seated wearing a robe and another person beside her ready to put a cap on her head (art image of an airplane on the center of the rear cover. There is a biplane illustration shown on the last page. This book has four complete sections. Top spine shift with some light foxing, creases, and tears to the cover and brown age-toned pages. About 7-1/4 x 5. Undated circa WW1 era. In Japanese. Scarce.