As Japanese people did not have knowledge about how to grow Korean ginseng, which was expensive because it had excellent beneficial effect used as a medicine in the early Edo period, its supply depended solely on the import from the Korean Peninsula, and the Tsushima Domain was in charge of this trade and the settlement was done by Keicho Chogin.
江戸時代初期、優れた薬効があり高価であった高麗人参は日本国内で栽培することができず、もっぱら朝鮮半島からの輸入に頼り、この貿易は対馬藩が担当し決済は慶長丁銀で行われていた。