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This study examines original documents of the negotiation between Tsushima-Clan and Korean government, of the cooperation between Tsushima-Clan and Hagi (Möri)-Clan of Korean correspondent envoy in the 13th year of Hðrekl; in 1763, which reached to Edo for the last time. It discusses the meaning of the Korean correspondent envoy and the reason of their suspension from the viewpoint of the political system of the Shogunate State of those days. In the first chapter, it argues the reception of Daimyös for the Korean Correspondent Envoy in the 13th year of HðrekÍ, in 1763, by the documents of Hagi(Möri)-Clan to conclude that they were afraid to make unexpected precedent and they became conceited from their abundant records of experience. Beyond the royalties for Tokugawa Shogunate, sympathy arouse among Daimyös who were engaged in the reception under the administration of Shogunate in place of disappear of circumspection for the reception of Korean correspondent envoy. On the other hand, the order of the Shogunate was given to the lord of Tsushima and the chief retamer of Tsushima-Clan m Edo. It reflects the administration of Shogunate and the relation between Shogunate and Tsushima- Clan in the middle of the eighteenth century. In the second chapter, the government officials of Tourajf u(Foreign Office at Dongnea) intended to keep their precedent to avoid to make undesirable precedent while the officials responsible of Tsuahima-Clan would restrict the precedent to the phase of documents and ceremomes and they asserted that the number of semor councilors had to be changed m the feudal system of the Shogunate state different from the bureaucracy of the dynasty of Korea to achieve their demand on the presents from Korea to the Shogunate. It shows an evidence that the diplomatic system of Korean correspondent envoy reached a dead end at m 1763. Also in 1763, independent judgment of Tsushima-Clan was disappeared as opposed to absolutely depend on the ambassadors were seemed to had final right of decide on Korean side.

It is said that Japan and Korea in the early-modern times had a ‘friendship’ relations for 260 years. One of the symbols was the Joseon delegation sent by Joseon to Japan. In 1811 , the final, the 12th Joseon delegations CTongsinsa) visited Tsushima. It was 24 years after shogun Ienari assumed the position of the 11th. Counting from the previous delegations, 47 years passed. The 12th Tongsinsa was also different from the previous ones in that the sovereign’s letters were exchanged in Tsushima instead of in Edo. Most of the research on the negotiations over the 12th Korean delegation still relied on the study by Tabohashi Kiyoshi. However, especially in recent years, an analysis of the Korean letters exchanged between the Korean interpreters and the Japanese ones had been progressing, and it showed what kind of exchanges were actually made regarding the negotiations at the forefront between Japan and Korea . In the historical materials written by Oda Ikugoro , an interpreter who did the prior discussion of the negotiations, he recorded a 10t of the actua1 exchanges that were not seen in the officia1 records of the Busan Weagwan, the forefront of dip1omacy. Therefore, in this paper, 1’d 1ike to confirm the issues being dea1t with by the Tsushima clan, the Korean dynasty, and the Edo shogunate re1ated to the negotiations, and clarify the activities of interpreters in Weagwan, based on the record of the ‘fie1d’ of negotiations over the Korean de1egation. Then 1 tried to draw the aspects of Japan-Korea exchange in Weagwan, which supports the negotiation, to clarify the rea1ity of Japan-Korea dip10macy from the end of the 18 century to the beginning of the 19 century. Unlike the usual route of instructions and orders, the negotiation of the 12th Joseon delegations was carried out secretly. An influential person of the Korean Dynasty ordered the interpreters to do so. As a result, when the key pillars had died, the negotiations stalled. Moreover, a case that some dip10matic documents were forged by the interpreters was revealed, and the negotiations got stuck. On the other hand, in Japan, Karos, chief retainers of the Tsushima clan, who followed the shogunate’s intention, ordered a certain interpreters to negotiate in the forefront. Because they as well did not take the usual route of command, a power struggle within the clan affected the negotiations. In the end, the shogunate intervened to suppress the forces of the opponents. The political stability of the two countries had allowed making good progress on the negotiations. In the background, however, there was a cooperative relationship between Korean and Japanese interpreters. They negotiated secretly with sharing information in depth, sometimes ousted the other interpreters who were interrupting the negotiations, and even collaborated to forge leUers to accomplish their aims. These relationships between interpreters were created through daily exchanges. Sometimes they treat yangban who visited Weagwan ‘to see the Japanese' generously. It lead to some knowledge about the ‘behavior of Japanese' to yangban in the short term, but also lead to connections between yanban and interpreters in the long term. Behind the diplomatic negotiations, there was the ‘effort’ in the ‘field' . The diplomacy was supported by the connections between people who worked at the forefront of both countries.

The history of Korea’s ships begins with a log raft, and the development of tools shows a log ship dug up inside the log, and develops into a quasi-structural ship that digs through the log and aUaches several to each other. Afterwards, the curved natural wood is refined to fit the structure, and it is developed into a structural ship that aUaches itself to each other and closes the wooden nails. The perfect type of structural ship was not only developed on the coast of Korea, but also on cultural exchanges with China and Japan through the sea route. Among them, the Joseon Tongsinsa ship was built and operated by a country that engaged in cultural exchanges between Korea and Japan during the Joseon Dynasty. During the four-year period from 2015 to 2018, this document summarizes and describes the details of ancient document and painting data analysis, two types of estimation design, execution design for reproducibility, shipbuilding engineering analysis for navigation performance and stability, and structure.

Although many studies are devoted to the historical record of the diplomatic envoys of the Joseon dynasty, few have investigated their involvement in the history of ceramics. Hence, this study examined the type and the significance of a kiln site of the 17th century and that of the white porcelain unearthed at Shiomi Tamon Yaguradai, Edo-castle and Naniwabetsuin, Osaka, both of which are important historical sites related to diplomatic envoys of the Joseon dynasty in Japan. White porcelain found at Shiomi Tamon Yaguradai, Edo-castle was thought to be a byproduct of imperial kilns from the second half of 16th century to early 17th century and kilns in Gyeongsangnam-do. Its characters appeared to be similar to those on tea ceremony utensils used as ritual vessels during the first half of the 17th century. They were believed to be either closely related to the Confucian ritual vessels used by the Shogun Tokugawa, during whose reign the commissioning of ritual vessels and ritual ceremonies in Nikkosan reached new heights, or to the white porcelain pots used to present honey to the Shogun as a gift. Joseon white porcelain found in Naniwabetsuin, Osaka is thought to be from Gyeongsangnam-do and was either brought there by diplomatic envoys as a “ tea bowl" or was possibly used as “ tableware" by envoys in that particular region, as observed in historical records. Regarding further research in ceramic history, first, an issue remains regarding the chronology of 17th-century white porcelain from Gyeongsangnam-do, which was an area frequented by these diplomatic envoys, and second, there is a need to increase materials based on academic excavations. Regarding the study of diplomatic envoys, the best approach is to perhaps deepen our understanding of ceramics as an essential cultural component that could provide empirical testimonies to a vast amount of historical records. Finally, further research in various fields , including archaeology, art history, and philological studies, could focus on ceramics in relation to these diplomatic envoys.