Chosokabe Motochika

Chosokabe Motochika defeated the Ichijo clan at the Battle of Shimanto River in Tosa. This victory eliminated a major rival and solidified Motochika's control over Tosa Province.

Chosokabe Motochika defeated the Miyoshi clan at Hiketa in Sanuki Province. This victory allowed Motochika to gain control over much of Sanuki, advancing his unification of Shikoku.

Chosokabe Motochika completed the unification of Shikoku island under his control. He defeated the Kono clan in Iyo and the Sogo clan in Sanuki, becoming the dominant daimyo on the island.

Toyotomi Hideyoshi launched a massive invasion of Shikoku, overwhelming Chosokabe Motochika's forces. Motochika surrendered and was forced to cede most of his territory, retaining only Tosa Province.