Fujiwara no Koretada/Koremasa (藤原 伊尹; 924 – 9 December 972), also known as Ichijō Sesshō, was a Japanese statesman, courtier, politician and waka-poet during the Heian period.

Emperor Murakami named Koretada conservator of Japanese poetry in 951.

[3] Koretada served as a minister during the reign of Emperor En'yū.

The immediate consequence of Koretada's death was a period of intense rivalry between his brothers Kanemichi and Kaneie.

[1] He was the oldest son; and became head of the Hokke branch of the clan after his uncle Saneyori died in 970.