Also called: Miyoshi Choukei
Title: Chikuzen no Kami

Historically: A warlord from Awa in Shikoku who destroyed the Hosokawa and Hatakeyama families by valor and treachery, thus establishing his dominance over Awa, Sanuki, Awaji, Yamashiro, Yamato, Kawachi, Settsu, and Izumi.

The Miyoshi family grew greatly in power during Nagayoshi's time as head of the clan and held the Ashikaga Shogunate under its thumb. In 1564, he had his younger brother Atagi Fuyuyasu killed due to slander from his vassal Matsunaga Hisahide and died of illness soon after (there are also theories that he was murdered by either Hisahide or the Miyoshi Triumvirate he appointed as guardians for his son). His son Miyoshi Yoshitsugu succeeded him as head of the clan after his death.