Shō Nei
The Kingdom of Ryūkyū was invaded by forces from the Satsuma Domain in the 12th year of "Keichō" (1609). King Shō Nei and a number of royal advisors and government officials were taken back to Kagoshima and then to Sunpu, where they met with retired "shōgun" Tokugawa Ieyasu. The delegation continued north to Edo for a formal audience in the shogunal court of Tokugawa Hidetada. Upon returning to Kagoshima, the king and officials were required to sign oaths of loyalty to Satsuma. Secondary sources, i.e. history books, often count this as the first tribute mission.