His birth year and birthplace are uncertain (accounts differ).
Around this time he entered Miyoshi Nagayoshi's service and, valued for his work on documents and more, rose to senior retainer.
He invaded Yamato (Nara) and made Shigisan castle his base. From about the next year he built Tamonyama castle at Nara, whose tall tower is said to have foreshadowed later castle keeps.
The Miyoshi Triumvirate and Hisahide's son Hisamichi attacked and killed the shogun Ashikaga Yoshiteru (the Eiroku Incident). Hisahide himself is thought not to have been there.
Fighting the Miyoshi Triumvirate in Nara, he was in the battle during which Tōdai-ji's Great Buddha Hall burned down.
When Oda Nobunaga entered Kyoto, he submitted, offering the famous tea caddy Tsukumo-gami Nasu, and was confirmed in Yamato.
Allied with Takeda Shingen and others he rebelled against Nobunaga, but surrendered the next year and handed over Tamonyama castle.
Rebelling against Nobunaga once more, he shut himself in Shigisan castle. Refusing to give up the famous tea kettle Hiragumo that Nobunaga coveted, he took his own life under siege.
Miyoshi NagayoshiOda NobunagaAshikaga YoshiteruAshikaga YoshihideHonda MasanobuOda NobutadaHosokawa TadaokiTakeda Shingen
Taigen SessaiMōri MotonariFrancis XavierŌuchi YoshitakaHōjō UjiyasuImagawa YoshimotoImai SōkyūTakeda Shingen
People of the Sengoku/Azuchi-Momoyama period ・ People by period
Based on facts found in textbooks and biographies. Uncertain points are marked as such.