In-depth article
Kaminokuni, Hokkaido
Katsuyama-date
上ノ国勝山館
A fort on the Sea of Japan built by the founder of the Matsumae clan, where over 500 bone and antler tools of the kind used by the Ainu turned up among the finds, suggesting Japanese settlers and Ainu lived side by side.
Next 100 Fine Castles No. 102Fortified residence (yakata)Mountain
