"National High School and Difficult Private High School Entrance Exam Prep: Advanced Problem Set - Mathematics" Obunsha Price: ¥1200 This is a book my child used for high school entrance exams. There are pencil-written dates for solutions, red pen checks, and highlighting with a marker up to page 35. Please check the photos. Please consider this item, as it is a used item stored at home. The child who used this book is now attending the University of Tokyo, Faculty of Law, Department 1. Thank you for looking.