Kōsokabe Chikayasu (香宗我部親泰, 1543 – 1593), third son of Chōsokabe Kunichika who was adopted by the in 1558 was a Japanese samurai of the Sengoku period, who served the Chōsokabe clan. He was the castle lord in command of Aki Castle. Throughout Chikayasu's life, he led many an army throughout his older brother Motochika's campaigns in Shikoku and contributing to the expansion of the domain of the Chōsokabe clan.