Fujiwara no Sadaie (藤原定家), better-known as Fujiwara no Teika (1162 – September 26, 1241), was a Japanese anthologist, calligrapher, literary critic, novelist, poet, and scribe of the late Heian and early Kamakura periods. His influence was enormous, and he is counted as among the greatest of Japanese poets, and perhaps the greatest master of the waka form – an ancient poetic form consisting of five lines with a total of 31 syllables. Teika's critical ideas on composing poetry were extremely influential and studied until as late as the Meiji era. A member of a poetic clan, Teika was born to the noted poet Fujiwara no Shunzei. After coming to the attention of the Retired Emperor Go-Toba (1180–1239; r. 1183–1198), Teika began his long and distinguished career, spanning multiple areas of aesthetic endeavor. His relationship with Go-Toba was at first cordial and led to commissions to compile anthologies, but later resulted in his banishment from the retired emperor's court. His descendants and ideas would dominate classical Japanese poetry for centuries afterwards. Source: Wikipedia (en)