【Yotsuya Otsuka Pre-Study Series: Kanji and Words, Grade 6, Upper and Lower Volumes Set】 List Price: ¥3,960 (¥1,980 x 2) Purchased as instructed by the cram school, but my child said the teacher distributed copies, so it was hardly used. In the upper volume, there are markings on the problem numbers for about 2 pages. (Please see photos ③ and ④) As far as I checked, there were no writings in the lower volume. (Please forgive any oversights.) Recommended for those considering junior high school entrance exams, as well as for supplementary learning for elementary school studies, for learning during long breaks, and for those aiming for difficult high schools in future high school entrance exams. *If sold separately, each book is ¥900. Yotsuya Otsuka Waseda Academy Waseda Academy Pre-Study Series Junior High School Entrance Exams High School Entrance Exams Drill Workbook Reference Book Kanji Drill Kanji Proverbs Idioms Compound Words Four-Character Idioms