Native to:
China North-Central,
Japan,
Kamchatka,
Korea,
Manchuria,
Primorye,
Sakhalin
Introduced into:
Alaska,
Altay,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Central European Russia,
Connecticut,
Czechoslovakia,
Delaware,
Denmark,
East European Russia,
Falkland Is.,
Finland,
France,
Germany,
Great Britain,
Hungary,
Illinois,
Inner Mongolia,
Ireland,
Italy,
Kentucky,
Maine,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Missouri,
Netherlands,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North European Russia,
Northwest European Russia,
Norway,
Nova Scotia,
Ohio,
Ontario,
Pennsylvania,
Poland,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
South European Russia,
Sweden,
Switzerland,
Ukraine,
Utah,
Vermont,
Virginia,
Washington,
West Virginia,
Wisconsin,
Yugoslavia