"Kadokawa Manga Learning Series: History of Japan, Complete 15 Volumes + 4 Supplementary Volumes, Standard Set" by Hirofumi Yamamoto Price: ¥15,200 I purchased this set and read all volumes once or twice, after which they were stored on a bookshelf. Although they have been stored for a long time, they are clean with no noticeable stains. However, please understand that there may be oversights due to my personal assessment. To prevent any issues, please refrain from purchasing if you are overly concerned about the condition of the books.