Rubus pectinellus Maxim.

from Japan, Tanbara, Kamihocchi, Numata-shi, Gunma (pictures 2 & 3)
Pictures 4 & 5 in Japan, Honshu, road to Takayama, June 2010
Pictures 6 & 7 in Taiwan, Alisha, 26 November 2013
Pictures 8, 9 & 10 in Taiwan, Lushan Valley, 24 November 2013