Sugawara no Michizane
The are the best known; 19 missions were completed. A 20th mission had been planned for 894 ("Kanpyō 6, 8th month"), including the appointment of ambassadors. However, shortly before departure, the mission was halted by Emperor Uda because of reports of unsettled conditions in China. The emperor's decision-making was influenced by the persuasive counsel of Sugawara no Michizane.