Miyoshi Masanaga (三好 政長, 1508 – July 18, 1549) was a Japanese samurai of the Sengoku period, a member of the Miyoshi clan who served as Hosokawa Harumoto.
[1] He is remembered as the cousin of Miyoshi Nagayoshi.
Due to this strong relation between the families, Chokei considered him a threat.
After 1548, Masanaga engaged in a major battle against his cousin, which ended in Chokei's victory.
Masanaga's whereabouts after this battle are unknown.