Ancient Japan’s Knowledge on the East Asia From the View of Kolukan

China,in the Tang Dynasty,was a developed country,politically,economically,and culturally,which had great influence on many East Asian countries.Japan started to send missions to Tang Dynasty to learn Tang’s cultural and institutional achievements to improve their development.In the diplomatic practice,Kolukan was very important.From the view of Kolukan,we will see the knowledge that Japan got from the communications with Tang,Silla,and other countries.The study of Kolukan’s historical contribution to the development of Japan is of academic significance.