In order to offer oriental scholars of the West material indispensable to the study of Japanese history and religion—particularly Shintō, the national religion of Japan—we venture to publish an English translation of the Kogoshūi, an historical book of old Japan, together with some brief introductory remarks and an ample supply of critical notes, resulting from our study of the book for years. We trust that it may prove a useful supplement to the Kojiki and the Nihongi, which have long been familiar to foreign students of things Japanese, through the excellent translations of Prof. B. H. Chamberlain and W. G. Aston respectively.