The adzuki bean (Vigna angularis; from the Japanese アズキ（小豆） (azuki), sometimes transliterated as azuki or aduki) is an annual vine widely grown throughout East Asia and the Himalayas for its small (approximately 5 mm) bean. The cultivars most familiar in Northeast Asia have a uniform red colour. However, white, black, gray and variously mottled varieties are also known. Scientists presume Vigna angularis var. nipponensis is the progenitor.