Sorbus commixta Hedl.

Picture 1 in Japan, Honshu, road to Nikko, June 2010
Pictures 2, 3, 4 & 10 in Japan, Honshu, Mt. Higashitate, June 2010
Pictures 5, 6 & 7 in South Korea, Chollipo Arboretum, September 2011
Pictures 11 & 12 in South Korea, Jirisan, September 2011