If I remember correctly, I bought and used this right before the center exam. I've only used about 20% of it, but it was very easy to understand and I carried it around with me, so I'm putting it up for sale. Original price: 900 yen + tax *Out of 269 pages, I used up to page 35 and there are notes written in it. (I'm embarrassed to say, but I wrote in it quite a bit, haha.) If you purchase this with other items, I may be able to offer a discount. Please consider it! ❁