Tokugawa Ieharu
King Yeongjo sent a diplomatic mission to Japan ("Joseon Tongsinsa") in 1764. This embassy to court of Tokugawa Ieharu was led by Jo Eom. This diplomatic mission functioned to the advantage of both the Japanese and the Koreans as a channel for developing a political foundation for trade. He brought in foreign crop, a sweet potato, and grew in Dongnae and Jeju Island.