I checked inside "Oiwa's First English Grammar: Super Basic Grammar Edition." As far as I can see, there are no markings. There are no noticeable stains or scratches, but please refrain from purchasing if you are looking for a perfect item. Please judge the condition of the item from the photos and purchase after understanding. I am also selling multiple reference books. I will discount 100 yen for combined purchases, so please feel free to contact me. (We may not be able to combine shipping depending on shipping costs.)