This name is a synonym of Prunella vulgaris subsp. asiatica (Nakai) H.Hara.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 166045) with original publication details: in Fl. Japan 3a: 299 1993.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:977951-1.
This name was in version 1 of The Plant List, record kew-166045.