Fujiwara no Sadayori (藤原定頼, 995-1045^[1]) was a Japanese waka poet of the mid-Heian period. One of his poems was included in the Ogura Hyakunin Isshu.^[1] He produced a private collection.^[1]

He was the eldest son of Fujiwara no Kintō and, on his mother's side, a grandson of Emperor Murakami.^[1]

He served director for military affairs before becoming middle councilor.^[1] He was well known as both a poet and a calligrapher.^[1]

Forty-five of his poems were included in imperial anthologies, and he was listed as one of the Late Classical Thirty-Six Immortals of Poetry (中古三十六歌仙, Chūko Sanjū-Rokkasen).^[1]

The following poem by him was included as No. 64 in Fujiwara no Teika's Ogura Hyakunin Isshu:

• Keene, Donald (1999). A History of Japanese Literature, Vol. 1: Seeds in the Heart — Japanese Literature from Earliest Times to the Late Sixteenth Century. New York: Columbia University Press. ISBN 978-0-231-11441-7.
• McMillan, Peter. 2010 (1st ed. 2008). One Hundred Poets, One Poem Each. New York: Columbia University Press.
• Suzuki Hideo, Yamaguchi Shin'ichi, Yoda Yasushi. 2009 (1st ed. 1997). Genshoku: Ogura Hyakunin Isshu. Tokyo: Bun'eidō.

• List of Fujiwara no Sadayori's poems Archived 2016-03-04 at the Wayback Machine in the International Research Center for Japanese Studies's online waka database.
• Fujiwara no Sadayori on Kotobank.