Saigen Jiro / CC0

The riverside remains of the castle held by the Sagara clan for roughly 700 years from 1198 until 1872, now a free-to-enter park of stone ramparts, moats and the Kuma River bluff. It is noted for its rare hanedashi overhanging stone walls, a European-inspired defensive design, and a small adjacent history museum.

Best season

Spring

Crowd level

Hidden gem

Opening hours

Ruins/park open daily (free); adjacent history museum roughly 9:00-17:00, closed Mondays

Usual hours — confirm with the official site for holidays + seasonal closures.

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