Japan Unlocked
Historic Ruins
◎ 100 Famous Castles

Komoro Castle

A unique '穴城' (sunken castle) built lower than the surrounding town on the slopes of Mt. Asama. Founded in the 16th century, its layered stone walls and original gates (Important Cultural Properties) are set within Natsume Soseki's beloved Kaikoen Park.

Japanese Name小諸城
PrefectureNagano Prefecture (長野県)
RegionChubu (中部)
Castle TypeHill Castle
Year Built16th c.
Designation100名城
Coordinates36.3236, 138.4256