A keyword commentary book for deepening the understanding of modern Japanese. - Title: Modern Japanese Keyword Reading - Author: Z-kai - ISBN: 978-4-86531-042-9 - Revised Edition: Revised Edition - Publication Date: July 10, 2015 Thank you for viewing. This is a must-have book for those who want to start studying modern Japanese. I used this reference book a little, so there is some soiling on the pages (see photo), but there are no markings or writing inside.