Vigna angularis Ohwi et H. Ohashi (= Phaseolus angularis Wight) or Phaseolus calcaratus Roxb., (Azuki)
original plant image
※Click on the image to enlarge it.
Family name
Leguminosae
Used part
mature seed
Quality for selection
For medicinal use, fresh, small sized and wine-colored shiny one is good. (NI)
Official compendium
CP (2020 ed.)
Clinical application
As an antidote and diuretic, Chixiaodou is applied for dropsy, beriberi, diarrhea and carbuncles. It is used as food.
Medical system
Traditional Chinese medicine
Drug effect in traditional medicine
Traditional classification
Diuretics removing dampness
Beneficial effect
[Property and Flavor] Neutral; sweet and sour.
[Meridian Tropism] Heart and small intestine meridians.
[Actions] To promote urination to alleviate edema, remove toxin and expel pus.
[Indications] Edema distention and fullness, beriberi and edema, jaundice with red urine, wind-dampness heat impediment, swelling abscess, sore and toxin, intestinal abscess with abdominal pain.
Chemical constituent
Sterols (*C1):
Phytosterol
Isoflavones P. vulgaris (*C1):
Phaseollidin, Phaseollin
Others (*C1):
結晶性サポニン I, 結晶性サポニン II, 結晶性サポニン III, 色素 / Crystalline Saponin I - III, Pigment
CP2020: Pharmacopoeia of the People's Republic of China 2020 edi.
C1) The Encyclopedia of Wakan-Yaku with Color Pictures Vol. I, pp 293-294.
Remarks
Many species are grown in Japan. Owariazuki (Chokan'azuki) and Akiazuki are the best quality for medicinal use, followed by Natsuazuki and Ōazuki (Dainagon).