冊封體制是前近代東亞國際關係的主要原理。在目前的學說中，其起源與早期變化的問題仍有探討餘地。本文主要目的是藉由第三世紀存在於朝鮮半島的辰王之例，探討漢魏之際冊封體制的演變，也同時觀察冊封體制如何影響我們理解古代東亞的政治秩序。本文以文獻學為方法，採史料批判的立場，以《三國志•魏書•東夷傳》為主要史料。本文第一部分討論正史四夷傳的信憑度問題。第二部分以漢代東北亞所謂蠻夷之國為例，探討漢朝將域外政權置於郡縣制下縣級屬國脈絡中的這一史實。第三部分探討第三世紀以後，東北亞出現所謂大國崛起的現象，於是蠻夷屬國不再被置於郡縣制下的縣級，開始發展出「自主的屬國」的制度。第四部分是考證該〈東夷傳〉中〈韓傳〉中的辰王相關紀錄。本文試圖在前人的業績下，重新解讀辰王相關的史實，以加深我們對於古代朝鮮半島南部王權的理解。

The investiture system was the main basis of international relations in pre-modern East Asia. This essay examines the origins and changes of the investiture system by studying the case of kingship of Chen, which ruled the southern Korean peninsula in the third century, recorded in Annals of the Three Kingdoms. First, I evaluate the credibility of the biographies of foreigners in the official histories. Second, I analyze the situation of vassals of the Han Dynasty outside of Han territory in northeast Asia, which provides a basis for reexamining the system of prefectures and counties. Third, I summarize the context of the rise of great powers in the third century, showing how the Han's vassals under the system of prefectures and counties became so-called "autonomous vassals." Finally, I review the texts of the "Biographies of Eastern Foreigners" in the Annals of the Three Kingdoms to illuminate what is known about King Chen, furthering our understanding of the types of monarchy in ancient East Asia.