Country/territory: Japan
Central coordinates (latitude / longitude): 34°31'00"N (34.5167°) / 139°16'59"E (139.2833°)
Area (reported): 412 hectares / 4.12 km² / 1,018 acres / 1.59 square miles
Area (GIS-derived): 409 hectares / 4.09 km² / 1,011 acres / 1.58 square miles
Altitude: 0–507 m (0–1,663 ft)