Japanese Castle Explorer

by Daniel O'Grady

The Baur Collection: Japanese Sword-Fittings and Associated Metalwork Imjin War book cover

Gassan Toda Castle

Images: Fujinamiism

Gassan Toda Castle is classified as a mountain castle, and is located in Shimane Prefecture. During the pre-modern age, it found itself within the borders of Izumo Province. It is associated with the Amako, Mōri clans. Dates in use: 1395 - 1611.

Considered one of the five great mountain castles of the Sengoku period. Certainly it's scale was great but what was the ingredient that allowed it to prosper in that hostile environment? This was a time before massive moats and unscaleable walls like those of Osaka castle. What protected this castle for 100's of years was the natural defenses its location offered which made it difficult for attacking armies.

Google Map Views (グーグルマップ)

Best view ベストビュー
Orbit view 軌道ビュー


1195 The castle was built by the Sasaki clan.
1395 Amago Mochihisa was put in control of the castle.
1484 Amago Tsunehisa, a servant of the Kyogoku clan, was expelled.
1486 Tsunehisa recaptured the Castle.
1541 The first battle of Toda Castle - A combined force of Ouchi & Mōri troops were repelled.
1566 The second battle of Toda Castle - The Mōri were victorious.
1567 Amano Takashige became lord of the castle.
1569 Mori Akimoto enters the castle.
1585 Another Mōri enters the castle.
1591 The Yoshikawa clan were transferred here.
1600 The Horio clan were transferred here.
1611 The Hoiri clan transfer to the newly built Matsue Castle.

Historical recognition

SiteNational Historic Site