Yotsuya Otsuka Yosyu Series 5th Grade Volume 1 and Problem Collection, Spring Seminar Set. All with answer explanations. Purchased in 2023. Revised text. Both the text and exercise problem sets (excluding the Spring Seminar) for all 4 subjects are composed of 20 sessions. There are no names written, but the top school 4 subjects and backup text of the Spring Seminar have traces of name stickers being peeled off. The science and social studies texts have many markings because lines are drawn on the parts you want to remember. Kanji and Kotoba (vocabulary) have many markings because they were done as homework. Other than the above and the Spring Seminar, I think there is relatively little writing. 【Math】 ・Textbook → 2 pages have red pen markings. There are no answer markings on the problems. There are no answer sheets for math. ・Exercise Problem Collection → No markings. There are no answer sheets to begin with. Both the textbook and the exercise problem collection have had all the circled areas marked with friction pens and the areas written in pencil erased. 【Japanese】 ・Textbook → Lines are drawn on 17 pages of the passage questions, and important parts of grammar and vocabulary are highlighted with a highlighter, but there are no answer markings on the problems. 80% of the answer sheets remain. ・Exercise Problem Collection → Unused, and all answer sheets remain. ・Kanji and Kotoba → All kanji confirmation problems are written in. There are no answer markings on the vocabulary problems, but 10 pages have important parts highlighted with a highlighter. There are no answer sheets because they were used. 【Science】 ・Textbook → 40% of the text has highlighter lines. There are no answer markings on the problems, but there are 4 pages where the answers to the choices are highlighted. There are no answer sheets because they were used. ・Exercise Problem Collection → There are 11 pages where the answers to the choices are highlighted or written on. There are 9 pages in the answer explanation booklet where the incorrect parts are highlighted. 4 answer sheets remain. 【Social Studies】 ・Textbook → 40% of the text has highlighter lines. There are no answer markings on the problems. Only 2 questions have the answers to the choices highlighted. 3 answer sheets remain. ・Exercise Problem Collection → There are 11 pages where the answers to the choices are highlighted or written on, and 12 pages in the answer explanation booklet where the incorrect parts are highlighted. 1 answer sheet remains. Please also see the comment section.