Vignaangularis, also known as the adzuki bean ,azuki bean, aduki bean, red bean, or red mung bean, is an annual vine widely cultivated throughout East Asia for its small (approximately 5 mm or 1⁄4 in long) bean. The cultivars most familiar in East Asia have a uniform red color, but there are also white, black, gray, and variously mottled varieties.
Scientists presume Vignaangularis var. nipponensis is the progenitor.