Iwakisan Kōgoishi

What it is

• An ancient mountain castle, designated a National Historic Site.
• Built on a mountain, its walls encircle the peak.
• Founded at an unknown time, now preserved ruins.
• Includes Iwakisan Shrine, a National Important Cultural Property.

What to see

• Castle walls, approximately 2.6 kilometers long.
• Two gates: an east gate and a north gate.
• Stone rows, originally buried within earthworks.
• Earthworks, once about 8 meters high.
• Iwakisan Shrine, a National Important Cultural Property.
• Views from 362 meters elevation within a natural park.

Notes written by Japan Gems from facts in Japanese Wikipedia.