"Rules of the World Explained Through Manga" Hiroyuki Yokoyama Price: ¥1429 The area with the owner's name has been blacked out. When the cover is removed, there are water stains on the front cover only, so please check the photos. We have reduced the price accordingly. #HiroyukiYokoyama #Hiroyuki_Yokoyama #book #society/education_and_learning