other · Korea and Japan

Amago clan domain

1486 CE – 1566 CE (approx.) · capital Gassantoda

The domain of the Amago of Izumo, who rose from deputies to masters of much of western Honshu before falling to the Mori in 1566.

Origins

The Amago were deputy governors of Izumo for the Kyogoku family. Amago Tsunehisa was expelled from his post but, according to tradition, retook Gassan-Toda castle by a ruse in 1486, and went on to make himself independent ruler of Izumo.

Rule and society

Tsunehisa and his grandson Haruhisa extended their power over the San'in and San'yo regions, at their height claiming influence over eleven provinces. They contested the Iwami silver mine with the Ouchi and withstood an Ouchi siege of Gassan-Toda in 1542 and 1543. The mountain fortress was the heart of a network of allied local lords.

Decline and legacy

After Haruhisa's death, Mori Motonari invaded Izumo and besieged Gassan-Toda, and Amago Yoshihisa surrendered in 1566. The retainer Yamanaka Yukimori fought to restore the clan until his death in 1578.

Connections (1)

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Cite this page
APA
The Epoch Institute. (2026). Amago clan domain. In The Epoch Institute States Register. https://the-epoch-institute.org/state/amago-clan-domain
MLA
“Amago clan domain.” The Epoch Institute States Register, The Epoch Institute, 2026, https://the-epoch-institute.org/state/amago-clan-domain. Accessed .
Chicago
The Epoch Institute. “Amago clan domain.” The Epoch Institute States Register. 2026. https://the-epoch-institute.org/state/amago-clan-domain.
Harvard
The Epoch Institute (2026) ‘Amago clan domain’, The Epoch Institute States Register. Available at: https://the-epoch-institute.org/state/amago-clan-domain (Accessed: ).

Last reviewed October 2026Random state ↻