Ichijō Tadayori (一条 忠頼, died July 25, 1184) was a Japanese samurai lord of the late Heian period.

Despite his contributions, Yoritomo feared Tadayori's and the Kai Minamoto clan's growing power, and ordered his assassination in 1184.

[3] The Azuma Kagami only states that the reason for the assassination of Tadayori was that "despite wielding power, he has the desire to bring disorder to the world", but it lacks a concrete explanation.

Koreyoshi was first seen in Engyōbon Heike Monogatari during the pursuit of Minamoto no Yoshinaka and in Azuma Kagami in the Battle of Ichinotani, and it is unclear when he was appointed to the post of Saemon-no-jō.

Although his appointment cannot be fully ascertained by this statement, if the Imperial Court had an intention to conciliate the Kai Minamoto clan as a counterweight to Yoritomo and Tadayori also had a desire to expand his power into the Musashi Province, a neighboring province of Kai, the appointment would make sense and its probability would be high.

The Azuma Kagami (May 1 article) states that a military force was dispatched from Kamakura to kill the ruling clique following the execution of Minamoto no Yoshitaka, the son of Yoshinaka.