Oka Castle Ruins
The stone walls of Oka Castle, once praised as an impregnable fortress, still remain today.
Oita / Tourist Attractions
The stone walls of Oka Castle, once praised as an impregnable fortress, still remain today.
Oita / Tourist Attractions
The impressive remnants of a fortress built by a Christian feudal lord, situated amidst the sea.
Oita / Tourist Attractions