This name is a synonym of Ajuga nipponensis Makino.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 5415) with original publication details: Bot. Mag. (Tokyo) 26: 294 1912.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:444690-1.
This name was in version 1 of The Plant List, record kew-5415, and has not been changed.