Country/territory: Japan
Central coordinates (latitude / longitude): 43°34'59"N (43.5833°) / 145°16'00"E (145.2667°)
Area (reported): 8,300 hectares / 83.00 km² / 20,510 acres / 32.05 square miles
Area (GIS-derived): 8,291 hectares / 82.91 km² / 20,488 acres / 32.01 square miles
Altitude: 0–10 m (0–33 ft)