"Productivity Soars! Professor Saru's "Let's Do Everything with Giga!"" Yoshimasa Sakamoto Price: ¥1800 #YoshimasaSakamoto #Books #Society/Education/Learning I am also listing a large number of educational books. Discounts are available for multiple purchases. These books have generally been read at least once. I have inspected them, but I apologize if I have overlooked any markings such as highlighting. Please refrain from purchasing if you are looking for a new-like condition.