Yakkos were often farmers and townspeople that worked part-time servants at a samurai's household. During the Edo period, the Tokugawa shogunate forced the warlords (daimyos) from all over the country to periodically live in the city of Edo (Sankin-kotai). The shogun's purpose was to keep a close eye over the daimyos, lest they plot some sort of uprising. During their stay in Edo, the daimyos hired lots of yakkos. See "Japanese Kites As Decorative Art". Japanesque Accents. 2011-05-31. Retrieved 2014-11-02.