Native to:
Assam,
Bangladesh,
Cambodia,
China North-Central,
China South-Central,
China Southeast,
East Himalaya,
Hainan,
India,
Japan,
Korea,
Laos,
Myanmar,
Nansei-shoto,
Taiwan,
Thailand,
Tibet,
Vietnam
Introduced into:
Alabama,
Albania,
Argentina Northeast,
Arkansas,
Austria,
Bulgaria,
Connecticut,
Delaware,
District of Columbia,
Easter Is.,
Fiji,
Florida,
France,
Georgia,
Greece,
Hawaii,
Hungary,
Illinois,
Iowa,
Italy,
Jawa,
Kansas,
Kentucky,
Kriti,
Lesser Sunda Is.,
Louisiana,
Malaya,
Maluku,
Marianas,
Marquesas,
Maryland,
Massachusetts,
Mississippi,
Missouri,
Nebraska,
New Caledonia,
New Guinea,
New Jersey,
New York,
North Carolina,
Ogasawara-shoto,
Oklahoma,
Pakistan,
Pennsylvania,
Philippines,
Pitcairn Is.,
Rhode I.,
Romania,
Sardegna,
Sicilia,
Society Is.,
Solomon Is.,
South Carolina,
Spain,
Sulawesi,
Sumatera,
Tadzhikistan,
Tennessee,
Texas,
Tonga,
Tuamotu,
Tubuai Is.,
Uganda,
Uzbekistan,
Vanuatu,
Virginia,
Wallis-Futuna Is.,
West Himalaya,
West Virginia