This article examines the current status and characteristics of Korean old books and manuscripts in Japan, focusing on physical materials that have historical significance for book exchange and research value. As an example of one of the many collections, a bibliographical analysis was conducted on 2,686 Korean old books of 482 types in the library of Waseda University, Japan, to identify themes and types of editions. Based on the bibliographic descriptions, the analysis shows that, except for the separate collections, there are relatively more biographies of masters, canon law, and miscellaneous books, and woodblock and metal type are the majority in terms of editions. The existing materials were examined case by case, and the materials from the Joseon Dynasty, Japanese books published based on Joseon texts, manuscripts and internal manuscripts, etc. have high research value as meaningful materials in the field of book exchange history and publishing culture history. Six types of Joseon Dynasty metal type printed books published before the Imjin War were identified and the process of their transmission, and internal manuscripts and manuscripts became an important factor in understanding the transmission of Korean manuscripts held in the Waseda University Library. It is necessary to conduct individual and intensive research on these important texts, and separate research on their relevance to other editions at home and abroad.