Sogō Kazumasa (十河 一存, 1532 - April 2, 1561), other name Sogō Kazunari (十河 和也), fourth son of Miyoshi Motonaga, was a Japanese samurai of the Sengoku period who was a member of Miyoshi clan, daimyo of Kawachi province. Miyoshi Nagayoshi (eldest), Miyoshi Yukiyasu (second) and Atagi Fuyuyasu (third) are his elder brothers and Miyoshi Yoshitsugu is his son (later became Nagayoshi's adopted son). He laterly adopted Miyoshi Nagaharu (Yukiyasu's son) his child.