Its ruins have been protected by the central government as a National Historic Site together with Yoshida-Kōriyama Castle since 1940.

He spent 23 years at this location has chieftain of the Tajihi Mori clan.

[3][4][5] Motonari's son Mōri Takamoto was born in the castle in 1523 as was his daughter Lady Goryū in 1529.

It is recovered that Mōri Takamoto spent one night at the castle in 1563 when on an expedition against the Amago clan in Izumo Province, to meet with his son Mōri Terumoto.

It appears that the castle was maintained as a secondary fortification for the Mōri clan until Mōri Terumoto moved clan's main stronghold to Hiroshima Castle in 1591.