Kawashima Koretada served as a bushō during the Sengoku period. Koretada was the lord of Kawashima Castle in Awa Province. He was a retainer of the Miyoshi family. He used the name of Hyōe-no-jō.
Koretada served valorously in the defeat of Shinohara Nagafusa at the Siege of Uezakura Castle during the sixth and seventh months of 1573, after which he was awarded a fief of 200 kan in the Kawashima area where he built Kawashima Castle.
In 1579, the forces of Chōsokabe Motochika attacked Waki Castle in Awa. At this time, Takeda Nobuaki, a retainer of the Miyoshi, served as lord of the castle. Nobuaki, along with Miyoshi Yoshitoshi (the lord of Iwakura Castle), were swayed by the Chōsokabe to betray the Miyoshi family. Nobuaki and Yoshitoshi then lured Miyoshi forces to Waki and completely decimated them below the castle. Koretada was among those retainers of the Miyoshi killed in this clash. His descendants then fled to Bitchū Province.
After the death of Koretada, Hachisduka Iemasa entered Awa and Iemasa’s retainer, Hayashi Yoshikatsu, became the next lord of Kawashima Castle.