This name is a synonym of Dioscorea japonica Thunb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 239839) with original publication details: J. Proc. Asiat. Soc. Bengal 4: 448 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:317704-1.
This name was in version 1 of The Plant List, record kew-239839.