Country/territory: Japan
Central coordinates (latitude / longitude): 27°03'00"N (27.0500°) / 142°13'00"E (142.2167°)
Area (reported): 3,862 hectares / 38.62 km² / 9,543 acres / 14.91 square miles
Area (GIS-derived): 3,845 hectares / 38.45 km² / 9,501 acres / 14.85 square miles
Altitude: 0–317 m (0–1,040 ft)