This is a set consisting of Volume 1 (originally published as Volumes 1 and 2 at the time of its founding) which was first published in 1964 (Showa 39), and Volumes 2-4 of the 2023 paperback edition (with larger print). The reason for this listing format is that the first volume of the paperback edition was left on an airplane, and the only copy that could be obtained separately was the first edition from 60 years ago. The first edition is in its cover, but as you can see in the photo, there is a hole. However, considering it's 60 years old, I believe it has considerable value. The original price was 420 yen for Volume 1, and 1,300 yen + tax for each of the paperback volumes. It will be shipped compactly.