Akebia trifoliata (Thunb.) Koidz.

in China, Sichuan, Mt.Emei, June 2002 (pictures 1 & 2)
in China, Sichuan, Wolong, 1 May 2007 (pictures 4, 5, 6 & 7)
in Japan, Honshu, road to Mt.Rokko, May 2008 (picture 8)
in Japan, Honshu, Mt.Fuji, May 2008 (picture 9)
in Japan, Honshu, Kawaguchi Lake, May 2008 (pictures 10, 11, 12 & 13)

Description in Bot. Mag. (Tokyo) 39:310 (1925)