Betula davurica

Betula dahurica (lit. 'Daur birch'), Dahurian birch, or Asian black birch (Chinese: 黑桦; pinyin: hēihuà), is a species of birch which is native to China, Japan, Korea, eastern Mongolia, and Russian Far East. It was introduced to the United Kingdom and also grows at the Arnold Arboretum in Boston. In Japan, it usually grows in Nobeyama in Nagano Prefecture in the island of Honshu where it is considered to be endangered. Small population of them can also be found on Hokkaido and Kuril Islands....read more on Wikipedia.