Mitsunao was born in 1619, and was the eldest son of Hosokawa Tadatoshi. In 1637, he joined his father in the effort to subdue the Shimabara Rebellion, and fought with distinction. Succeeding his father in 1641, he became daimyo of the Kumamoto Domain.
Mitsunao's suppression of the Abe family's revolt in 1642 is famous, due to its fictionalization by Mori Ōgai.
|Lord of Kumamoto
| Succeeded by|
|Ancestors of Hosokawa Mitsunao|
- (Japanese) List of Kumamoto lords on "Edo 300 HTML" (8 October 2007)