The fourth head of the Amago clan, a Sengoku warlord based in Izumo. He expanded the power that his grandfather Tsunehisa had built even further, becoming the greatest warlord in the Chugoku region, controlling eleven provinces across Sanin and Sanyo. He clashed fiercely with Mori Motonari, overwhelming the Mori forces in the First and Second Battles of Gassan-Toda Castle. However, pressed increasingly by the Mori clan's rise, he died suddenly in 1560 — a turning point in the Amago clan's decline. He deeply revered the Izumo Grand Shrine and reigned as protector of the divine land of Izumo. He is also famous for producing loyal retainers known as the "Amago Ten Braves," including the legendary Yamanaka Shikanosuke.

A warlord endowed with the capacity for hegemony and martial valor inherited from his grandfather Tsunehisa. He treasured deep faith in the gods of Izumo and good governance for his people, but in responding to Mori Motonari's schemes he was often a step behind.

Evaluated as the warlord who realized the Amago clan's greatest territorial extent. Because the great general Yamanaka Shikanosuke worked after his death in pursuit of Amago restoration, the Amago clan continued to live in the hearts of the Japanese even after its extinction.