I bought these for my elementary school children, but they were never used and have been stored at home. They are not from a 100-yen shop, but were purchased through the school, so they are of good quality. The retail price was 180 yen each. The pages are loose, so please check carefully before purchasing. Individual sales are also possible. 1 book: 300 yen 2 books: 399 yen 3 books: 499 yen 4 books: 599 yen 5 books: 699 yen 6 books: 799 yen