The Collaborative International Dictionary of English v.0.48:

Adsuki bean \Ad*su"ki bean\ ([a^]d*s[=oo]"k[i^];
   [a^]d*z[=oo]"k[i^]). [Jap. adzuki.]
   A cultivated variety of the Asiatic gram, now introduced into
   the United States.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

adsuki bean
    n 1: bushy annual widely grown in China and Japan for the flour
         made from its seeds [syn: adzuki bean, adsuki bean,
         Vigna angularis, Phaseolus angularis]