The history of buckwheat leaf as food is long. In 984, the âIshinpoâ, the oldest medical
book in Japan edited by Yasuyori Tanba, mentions that buckwheat washes away dirty wastes in
the 5 major visceral organs and connects the sprit and God, its leaves can be boiled and eaten as
a vegetable, and buckwheat markedly improves the function of the ears and eyes and reduces
excessive spirit. Thus, buckwheat has been recognized as a food that is good for health.
In China, buckwheat leaves are also used as a medicinal suppliments. Concerning efficacy,
the Great Chinese Medical Dictionary mentions that buckwheat leaves used for hypertension
due to fragile capillaries prevent cerebral bleeding, and they also prevent various types of
bleeding due to fragile capillaries and non-tuberculosis pulmonary bleeding, and can be used for
the treatment of diabetic retinopathy. Thus, buckwheat leaves have effects on impaired
circulation.