This is a book titled "Mumonkan Explained" by Masaharu Taniguchi. "Mumonkan" is a collection of Zen koans compiled in 1228 by the Chinese Song Dynasty Zen monk Mumon Ekai. It contains 48 selected koans (problems that serve as a trigger for enlightenment) from ancient times, along with commentaries. It is a highly valued book in the Zen sect as an introductory text to enlightenment. This book is an explanation of "Mumonkan" by Masaharu Taniguchi. It has been stored at home for a long time. There are stains, discoloration, and yellowing due to aging, as well as markings. We would appreciate it if only those who understand this would purchase it. Thank you for viewing.