Ardisia japonica is a species of Ardisia native to eastern Asia, in eastern China, Japan and Korea. It is a low-growing, spreading very quickly evergreen shrub 20–40 cm tall. The leaves are opposite or in whorls, ovate, 4–7 cm long and 1.5–4 cm broad, with a sharply serrated margin and an acute apex.

It is used as a medicinal plant in traditional Chinese medicine, where it is called aidicha and is considered one of the 50 Fundamental Herbs. Sixteen known compounds: chrysophanol, physcion, oleanolic acid, euscaphic acid, tormentic acid, quercetin, quercitrin, myricitrin, kaempferol 3-O-alpha-L-rhamnopyranoside, cyclamiretin A 3-O-alpha--rhamnopyranosyl(1-->4)-beta-D-glucopyranosyl(1-->2)-[beta-D-glucopyranosyl(1-->4)]-alpha-L-arabinopyranoside, (7E)-9-hydroxymegastigma-4, 7-dien-3-on-9-O-beta-D-glucopyranoside, bergenin, norbergenin , rutin, kaempferol 3,7-O-alpha-L-dirhamnopyranoside, (-)-epigallacatechin 3-O-gallate were obtained.