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Gassantoda Castle

Also known as Gassan-Toda Castle, Gassan Toda Castle

Gassantoda Castle was a mountain castle at Hirose in Izumo province, now part of Yasugi in Shimane Prefecture, Japan. As the seat of the Amago clan it withstood a siege by the Ōuchi in 1542–1543 but fell to Mōri Motonari in 1566 after a long siege. It was abandoned in the early 17th century when the lords of Izumo moved to Matsue, and only earthworks and stone walls remain.

Gassantoda Castle
Image: 安来市政策秘書課 · CC BY-SA 4.0 · Wikimedia Commons

Mentioned in 2 state histories

Amago clan domainMatsue Domain

See also

Cite this entry
APA
The Epoch Institute. (2026). Gassantoda Castle. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/gassantoda-castle
MLA
“Gassantoda Castle.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/gassantoda-castle. Accessed .
Chicago
The Epoch Institute. “Gassantoda Castle.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/gassantoda-castle.
Harvard
The Epoch Institute (2026) ‘Gassantoda Castle’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/gassantoda-castle (Accessed: ).

Last reviewed October 2026Random entry ↻