Yotsuya Otsuka Pre-Study Series Year 4, Volume 1 Yotsuya Otsuka Pre-Study Series Math I am selling the four books in the photos. There are some notes written in various places, but they are minor and shouldn't hinder solving the problems. Basically, there are no writings. Please understand that these are used items before purchasing. Thank you. Junior High School Entrance Exams Yotsuya Otsuka Waseda Academy Waseaca Fourth Grade Elementary School