Country/territory: Japan
Central coordinates (latitude / longitude): 33°34'59"N (33.5833°) / 131°19'00"E (131.3167°)
Area (reported): 3,800 hectares / 38.00 km² / 9,390 acres / 14.67 square miles
Area (GIS-derived): 2,955 hectares / 29.55 km² / 7,302 acres / 11.41 square miles
Altitude: 0–5 m (0–16 ft)