The Cream-fruited coralberry (Ardisia crenata f. leucocarpa) belongs to Myrsinaceae (the Myrsine family). It is an evergreen shrub that is a cultivar of the "coralberry" variety, which is found in Japan from the Kanto region west of Honshu to Shikoku, Kyushu in Japan, as well as widely in Southeast Asia. It has been cultivated since around the Edo period (about 200 years ago) as a good-luck charm, and various varieties have been selected and bred. This variety lacks the gene that produces anthocyanin and also lacks yellow pigmentation, and the fruit is white.
Incidentally, "manryo" (coralberry) is also used in ikebana as a lucky charm for the New Year, together with "senryo" and "aridoshi" (Indian damnacanthus), a play on the words "senryo, manryo, aridoshi" (There's money, a thousand and one, all year round.).