These are calculation cards used in math class from the first grade of elementary school. The manufacturers are: Addition and subtraction cards are from "Bunkei". Multiplication table cards are likely from "Hishiesu Seibunsha". All cards have the owner's name written on the first card, which has been blacked out. The name on the two multiplication table card sets was written by the owner, and it slightly extends outside the designated area. Also, the "5 x 9" multiplication card has a small amount of damage on the corner. Please check the images. Other than the above points, the cards are in very good condition! To reduce the thickness for shipping, the cards will be removed from the ring. Please be aware of this. These are used items stored at home, so we appreciate your understanding.