"The high quality of poetic theory (karon) in this age depends chiefly upon the poetic writings of Fujiwara Shunzei and his son Teika. The other theorists of tanka writing, stimulated by father and son either to agreement or disagreement, contributed also toward the high level of poetic theory, but we may say that Shunzei and Teika were most representative of the age." This quote is sourced to Odagiri Hideo in pg 10 of his "Nihon ni okeru bungei hyōron no seiritsu" (The Rise of Art Criticism in Japan), pub. by Geijutsuron-shū ("Collection of Discussions of Art"), Tokyo 1962; see Shun'ichi H. Takayanagi 's review of Japanese Court Poetry by Robert H. Brower and Earl Miner in Monumenta Nipponica, Vol. 18, No. 1/4. (1963), pp. 352-364. JSTOR2383146
pg. 34; Miner adds this in a footnote: "Sasamegoto, NKGT, V, 268". An Introduction to Japanese Court Poetry, by Earl Miner. 1968, Stanford University Press, LC 68-17138
However, Shun'ichi H. Takayanagi in his review of Japanese Court Poetry by Robert H. Brower and Earl Miner (Monumenta Nipponica, Vol. 18, No. 1/4. (1963), pp. 352–364. JSTOR2383146) says that this quote is actually from Shunzei's son, Teika, when Teika was describing his father to his son, Tameie.
loc.gov
lccn.loc.gov
Miner, Earl; Brower, Robert H. (1961). Japanese Court Poetry. Stanford University Press. p. 265. LCCN61-10925. OCLC326761.