The castle site was once held by the Oba clan, loyalists to the Taira clan during the late 12th-century Genpei War.
Strategic remnants include remnants of the 'kuruwa' (enclosures) and 'hori' (moats) that defined the castle's defensive perimeter.
The park serves as a disaster prevention site for the local Fujisawa community, featuring infrastructure designed for emergency response.
The elevation of the park plateau offers a clear line of sight towards Mount Fuji on days with high visibility.
Large sections of the park are dedicated to open lawn space, intentionally kept clear for community gatherings and recreation.
Ōba Jōshi Park is a historical site situated on the grounds of the former Ōba Castle, a defensive stronghold originally built by the Oba clan during the Heian period. The park preserves the topography of the medieval fortification, featuring earthworks, dry moats, and elevated plateaus that once served as strategic vantage points. It spans a significant hillside area, providing elevated views over the surrounding Fujisawa landscape. The grounds are characterized by open grassy clearings and stands of mature cherry trees, making it a local destination for seasonal blooms. It functions as a public recreational space maintained by the City of Fujisawa, integrating historical preservation with community leisure facilities.
The main elevated lawn area offers the best panoramic perspective of the historic earthworks framed by seasonal foliage.
Bring a picnic blanket or folding chair as seating is limited to designated benches and wide lawn areas.
Use insect repellent during the summer months, as the forested portions and natural moat topography attract mosquitoes.
Plan your visit to coincide with the cherry blossom season, as the park features a high density of mature Sakura trees.
Do not visit expecting fully reconstructed castle buildings; the site consists primarily of excavated earthworks and open parkland.
Carry out all trash, respect quiet zones near residential borders, and refrain from climbing on historic earthwork mounds.
