Lifespan: Eishō 7 (1510) to Eiroku 2 (1559)
Lord: Hosokawa Harumoto → Hosokawa Ujitsuna
Father: Sogō Yasumasa
Adopted Children: Kazumasa (youngest brother of Miyoshi Nagayoshi)
Sogō Kageshige served as a bushō during the Sengoku period. Kageshige was a kokujin, or provincial landowner, in Sanuki Province. Together with the Miyoshi clan, he served the Hosokawa – the deputy shōgun family of the Muromachi bakufu. Kageshige served as the lord of Sogō Castle. He was the son of Sogō Yasumasa and also known under the name of Masaharu.
In 1526, Kageshige made a plan with Miyoshi Nagayoshi to attack Sangawa Motomasa, but it was discovered before they could take action. Kageshige was then subject to a surprise attack by the Sangawa and fled in defeat.
Around 1530, Kageshige’s eldest son and lineal heir, Sogō Kanamitsu, died at an early age.
To raise the prominence of the Miyoshi clan and solidify their foundations, Miyoshi Nagayoshi sent his youngest brother, Kazumasa, to be adopted by Kageshige as his designated heir, whereupon he became Sogō Kazumasa. Owing to his acts of valor on the battlefield, Kazumasa earned the nickname “Demon Sogō,” contributing to the expansion of the Sogō clan while controlling one-half of Sanuki Province.