The purpose of this study is to investigate how one can find all journals of a country covered in a database such as SCI. We searched SCI and JCR Science Edition 2006 databases for Korean journals using four definition criteria-Country of a journal publication, Editorship, Unique words appeared in a journal title designating a country, a number of papers from a country in a journal. We also checked related literatures and websites to find information on SCI Korean journals. The study shows that 40 Korean journals were covered in SCI in 2006. SCI identified 38 of them as journals from South Korea, and JCR 2006 included 36. 11 journals had unique words indicating that they are Korean journals. 9 journals were Korean journals among the top 20 SCT journals by the number of papers with Korean addresses, and 36 journals were included among the top 500 SCI journals.