This name is a synonym of Vincetoxicum acuminatum Raf..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name with original publication details: Index Pl. Jap. 2: t. 508 1912.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:95987-1.
This name was in version 1 of The Plant List, record kew-2750783.