Yotsuya Otsuka's Yosyu Series & Exercise Problem Collection Set Thank you for viewing. I also used this a few months ago for final exam preparation. I erased the dates when I solved the problems, which were written in pencil on image 11. Other than that, I believe there are no other markings, but I apologize if I missed anything... Thank you for your understanding regarding used items. Since I have finished the entrance exams, I will be listing items related to junior high school entrance exams.