Native to:
Afghanistan,
Altay,
Amur,
Assam,
Bangladesh,
Buryatiya,
Cambodia,
China North-Central,
China South-Central,
China Southeast,
Chita,
East Himalaya,
India,
Inner Mongolia,
Irkutsk,
Japan,
Jawa,
Kamchatka,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kuril Is.,
Laos,
Lesser Sunda Is.,
Malaya,
Manchuria,
Mongolia,
Myanmar,
Nansei-shoto,
Nepal,
Pakistan,
Primorye,
Qinghai,
Sakhalin,
Sulawesi,
Sumatera,
Tadzhikistan,
Taiwan,
Thailand,
Tibet,
Tuva,
Vietnam,
West Himalaya,
West Siberia,
Xinjiang
Introduced into:
Baltic States,
Belarus,
Central European Rus,
Connecticut,
Czechoslovakia,
Denmark,
East European Russia,
Germany,
Maine,
Manitoba,
Massachusetts,
Minnesota,
New Brunswick,
New Jersey,
New York,
North Carolina,
North Dakota,
North European Russi,
Northwest European R,
Ontario,
Pennsylvania,
Poland,
Québec,
Romania,
Sweden,
Turkey-in-Europe,
Ukraine,
Vermont,
West Virginia,
Wisconsin,
Yugoslavia