後鳥羽天皇
In the late period rule by cloistered Emperors, or the early Kamakura period (1185–1333), Emperor Go-Toba (1180–1239), who had abdicated, ordered the compilation of the eighth imperial anthology of waka, the "Shin Kokin Wakashū". Go-Toba himself joined the team of editors. Other editors included Fujiwara no Teika and Kamo no Chōmei.