After serving as compiler of history at Government-General of Korea became assistant professor of Keijo (Seoul) University (1935) and then professor of same university (1939). Returned to Japan following termination of the war.
He was appointed to post as professor of Gakushuin (Peers' School) College (1947), served also as chief librarian of same college and instructor of Tokyo University. Received degree in literature (1951).
He interested especially in revision and publication of historical books of Korea, he worked for publication of popular edition of "Authentic Records of Rhee Dynasty."