I checked the contents for about a minute, and it appears there are no markings. However, there may be oversights, and some items might have minor scribbles or spiral binding. Please refrain from purchasing if you are sensitive to such details or seek perfection. (Some items may have minor scribbles.) Please assess the product condition based on the photos and purchase with your understanding. If, after purchase, there are any markings that significantly hinder your ability to study, please contact me within two days of arrival without confirming receipt. I will cover the return shipping costs. Please only purchase if you understand that this is a used item. I am also selling multiple reference books. I will offer a 100 yen discount for combined purchases, so please feel free to inquire. (Please note that I may not be able to combine shipping depending on the item.)