Chigasaki Castle, Castle ruin in Tsuzuki Ward, Yokohama, Japan

Chigasaki Castle is a ruin on a hill in Kanagawa Prefecture featuring preserved stone walls and fortification remnants. From this elevated position, one can look out across the surrounding landscape.

Chigasaki Castle was built in the second half of the 15th century and repaired in the first half of the 16th, though a tradition credits Tada Yukitsuna with founding it in the 1020s. Excavated wares such as kawara-ke tiles with a spiral mark point to the Ogigayatsu Uesugi rather than the Later Hojo. The Odawara shu shoryo yakucho lists the area as Zama clan land, making it a branch castle of Koyama Castle. It was abandoned in 1590 with the fall of the Later Hojo.

The name Chigasaki is written 茅ヶ崎 in the city's own pages, though the neighbourhood is officially 茅ケ崎; the sign at the park entrance reads 茅ヶ崎城址公園. Excavated finds centre on uzumaki kawarake, small dishes with a spiral mark incised in the base, linked to the Ogigayatsu Uesugi rather than the later Hojo. The site is a Yokohama City designated historic site since 2 November 2009.

The site is free to visit and easily reached by nearby train stations. Wear sturdy shoes since you will walk over hills and paths that can be uneven.

Excavated finds are mostly uzumaki kawarake, small dishes with a spiral mark incised in the base, linked to the Ogigayatsu Uesugi rather than the Later Hojo, whose relics were not found. The castle is also counted among the 268 sites of the Kohoku New Town archaeological group.