The Tsushima Domain, which was located between Japan and Korea, had economically depended on trade with Korea because of its geographical conditions; therefore, for the sake of the restoration of diplomatic relations with Korea, the Domain acted as a mediator between Japan and Korea and they had some activities such as sending back Korean captives who had been brought to Japan during Japan's Invasions of Korea.
日本と朝鮮の中間に位置する対馬藩は地理的条件から経済を朝鮮との交易に依存していた背景もあり、朝鮮との国交回復のため、朝鮮出兵の際に連れて来られた捕虜の送還をはじめ日朝交渉を仲介した。