This name is a synonym of Buxus microphylla Siebold & Zucc..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: in Fl. Japan 2c: 107 1999.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1014290-1.
This name was in version 1 of The Plant List, record kew-2687944, and has not been changed.