famed for his mastery of imayō. Waka in the period of cloistered rule Some new trends appeared in waka. There were two opposite trends: an inclination to the contemporary, modern style and on the other hand a revival of the traditional style. Both trends had their schools and won the honor to compile imperial anthologies of waka. Fujiwara no Shunzei and his son Fujiwara no Teika were the leaders of the latter school. Renga in the period of cloistered rule Also in this period for the first time renga were included in the imperial anthologies of waka. At that time, renga was considered a variant of waka. The renga included were waka created by two persons only, quite unlike the later style which featured many stanzas. Kamakura period The Kamakura period (1185–1333) is a period of Japanese history that marks the governance by the Kamakura shogunate, officially established in 1192 AD in Kamakura, by the first shōgun Minamoto no Yoritomo. The period is known for the emergence of the samurai, the warrior caste, and for the establishment of feudalism in Japan. Shin Kokin Wakashū anthology 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. Later Imperial waka anthologies The Kamakura period influence continued after the end of the actual period: after the Shin Kokin Wakashū, fourteen waka anthologies were compiled under imperial edict: the 13 and the Shin'yō Wakashū (c. 1381). These anthologies reflected the taste of aristocrats (and later, warriors) and were considered the ideal of waka in each period. Moreover, anthologizing served as a proof of cultural legitimacy of the patrons and often had political connotations.<ref>Huey, Robert. (1997: 170–192) "Warriors and the Imperial Anthology" in The Origins of Japan's Medieval World: courtiers, clerics, warriors, and peasants in the fourteenth century. Ed. by Jeffrey P Mass, Stanford, Calif. : Stanford University Press, . For the list of the Jūsandaishū, see the Nijūichidaishū article.</ref> Nanboku-chō period The Nanboku-chō period (1334–1392) is also known as the "Northern and Southern Courts period". Poetic movements included Renga developments, such as the publication of the Tsukubashū – the first imperial anthology of renga, in about 1356. There were various Renga poets, critics