This study is a report on recently discovered medical records based on traditional medicine in the1900s. First, the contents of the records and their significance are described in detail. Next, asimple example of the research follows, in order to explain the medical and historical significancethe records contain and to answer the question of how this historical document can contribute tofuture medical and historical studies. The documents dealt with in this study, the ChunggangMedical Records, are medical records compiled by a Korean doctor of oriental medicine by thename of Younghun Kim who practiced in the center of Seoul for a period of over 60 years. Therecords, which eventually amounted to over 1,500 books, were made known to the academicworld when the descendents recently donated them to Kyunghee University. The reason thesemedical records attract so much attention from academic circles, even though they are the work ofone individual, is that they contain abundant information on general public medical health at thetime, in addition to the fact that Kim Younghun was a well known figure among OrientalMedicine doctors in Korea. The medical records start in 1915 and continue until Kim Younhun’sdeath in 1974, though they have some damaged or missing parts. Kim’s medical records are agold mine not only for scholars studying the medical history of the early 1900s, but also fordoctors trying to emulate the techniques embedded in a great predecessor’s medical practice.