This name is a synonym of Convallaria keiskei Miq..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 312203) with original publication details: Ill. Fl. Jap. 731 1948.
This name was in version 1 of The Plant List, record kew-312203, and has not been changed.