Country/territory: Japan
Central coordinates (latitude / longitude): 36°01'59"N (36.0333°) / 140°24'00"E (140.4000°)
Area (reported): 17,000 hectares / 170.00 km² / 42,008 acres / 65.64 square miles
Area (GIS-derived): 17,253 hectares / 172.53 km² / 42,633 acres / 66.61 square miles
Altitude: 0–15 m (0–49 ft)