Country/territory: Japan
Central coordinates (latitude / longitude): 30°28'59"N (30.4833°) / 140°18'00"E (140.3000°)
Area (reported): 453 hectares / 4.53 km² / 1,119 acres / 1.75 square miles
Area (GIS-derived): 475 hectares / 4.75 km² / 1,174 acres / 1.83 square miles
Altitude: 0–400 m (0–1,312 ft)