Business book that encourages efficient effort!! ✳︎ Title: The Law of Improvement ✳︎ Author: Koichi Okamoto (University of Tokyo graduate) ✳︎ Price: 680 yen (excluding tax) ✳︎ ISBN: 978-4-569-62198-2 ✳︎ Size (approx.): 17.3cm (height), 10.6cm (width), 1.3cm (thickness) Thank you for viewing! I don't remember reading it(^^;; But it seems like a book that will raise your awareness if you read it!!