Chōsokabe Motochika (長宗我部 元親?, 1539 – July 11, 1599) was a Sengoku period daimyo in Japan. He was the 21st chief of the Chōsokabe clan of Tosa Province (present-day Kōchi Prefecture). He was the son and heir of Chōsokabe Kunichika and his mother was a daughter of the Saitō clan of Mino Province.
In 1575, Motochika was victorious at the Battle of Watarigawa, gaining control of Tosa Province. Over the ensuing decade, he extended his power to all of Shikoku. However, in 1585, Hashiba (later Toyotomi) Hideyoshi invaded that island with a force of 100,000 men, led by Ukita Hideie, Kobayakawa Takakage, Kikkawa Motonaga, Hashiba Hidenaga, and Hashiba Hidetsugu. Motochika surrendered, and forfeited Awa, Sanuki, and Iyo Provinces; Hideyoshi permitted him to retain Tosa.
Under Hideyoshi, Motochika and his son Nobuchika participated in the invasion of neighboring Kyūshū, in which Nobuchika died. In 1590, Motochika led a fleet in the Siege of Odawara, and also fought in the Japanese invasions of Korea in 1592.
- Grandfather: Chōsokabe Kantesugu (died 1508)
- Father: Chōsokabe Kunichika (1504-1560)
- Wife: Nana (also called Lady Motochika)
In popular culture
In anime adaptation Sengoku Basara: Samurai Kings, he is a brash young man and the leader of a pirate gang. Using a sharpened anchor on a chain-wound pole for a weapon, he can use fire to some surprising effect.
- 亀岡龍太 (December 11, 2010). "http://mytown.asahi.com/areanews/kochi/OSK201012100141.html" [Chōsokabe clan documents on display at Tosa Yamauchi Family Treasury and Archives beginning on the 11th] (in Japanese). Asahi.com My Town. Archived from the original on August 22, 2011. Retrieved August 22, 2011.
- "Motochika + Dewott - Pokemon Conquest characters". Pokemon. Retrieved 2012-06-17.
- 新井政義（編集者）『日本史事典』。東京：旺文社 1987 (p. 263)