Native to:
Bangladesh,
Cambodia,
China North-Central,
China South-Central,
China Southeast,
East Himalaya,
Hainan,
India,
Inner Mongolia,
Japan,
Korea,
Malaya,
Manchuria,
Myanmar,
Nepal,
Philippines,
Primorye,
Taiwan,
Tibet,
Vietnam,
West Himalaya
Introduced into:
Alabama,
Andaman Is.,
Arkansas,
Connecticut,
Cook Is.,
Cuba,
Delaware,
District of Columbia,
Dominican Republic,
Florida,
Georgia,
Illinois,
Indiana,
Iowa,
Kansas,
Kentucky,
Leeward Is.,
Louisiana,
Maryland,
Michigan,
Mississippi,
Missouri,
Nebraska,
New Caledonia,
New Jersey,
New York,
North Carolina,
Ohio,
Oklahoma,
Pennsylvania,
Puerto Rico,
South Carolina,
South Dakota,
Tennessee,
Tonga,
Trinidad-Tobago,
Venezuela,
Virginia,
West Virginia,
Windward Is.,
Wisconsin