발해의 영역에서 본 고구려 계승성
Palhae was the kingdom stood for the first time in 30 years after Koguryo goes to ruin. Today, The territory of Palhae was the southern Manchuria of China and the southern Maritime Province of Russia, the north Korea. The territory of Palhae inherited the one of Koguryo as it increased 1.5 times or 2 double. The territory can be referred to as having spread in a northeast area including the Maritime Province. On the other hand, the contents about the human-ethnical succession relation which carries out whether the people from Palhae was the posterity of Koguryo can be considered by move situation and fixing grade of the residents who resided in the Koguryo domain. It must take into consideration the fact which the residents of Koguryo after the Koguryo downfall moved in large numbers in the inland of Tang by compulsion. However quite many numbers in these were the influence which came back from the Palhae founding of the country process to the hometown again, the population which remained in the inland of Tang there was a few. Moreover, the populations who is Koguryo and Palhae was main industry it was farming, the way of a life of the residents to whom a political system like the Juhyun(zhouzian: 州縣) system also mainly carries out fixing too is reflected. Such various situations are the spatial and human of Kokuryo and Palhae, it can be said that it was carrying out proof of the succession relation strongly.