Prunus buergeriana

About

Prunus buergeriana, in Japanese イヌザクラ (inu-zakura), meaning dog cherry, is a species of bird cherry native to Japan, Korea, Taiwan, China, northeast India (Sikkim), and Bhutan. In China it prefers to grow on mountain slopes at 1000 to 3400 m above sea level. Its closest relative is Prunus perulata, from which it is morphologically and genetically distinct.

Summary from Wikipedia