Adzuki Beans

Adzuki Beans: Nutrition, History and Complete Cooking Guide

The adzuki bean (Vigna angularis) — also spelt azuki or aduki — is a small, oval, deep-red bean with a distinctive white ridge, native to East Asia and one of the most important and culturally significant pulses in Japanese, Korean, and Chinese cuisine. In Japan, the adzuki bean holds a ceremonial and celebratory role that no other bean approaches: sekihan (red rice, made with glutinous rice cooked with adzuki beans that stain the rice pink) is served at auspicious occasions — weddings, Coming-of-Age Day, school graduations, and New Year celebrations. The red colour is considered auspicious, associated with good fortune and the warding off of evil. Beyond ceremony, adzuki's most important application is in sweet preparations: anko — sweetened adzuki bean paste — is the most important confectionery ingredient in Japanese wagashi (traditional sweets), filling mochi, dorayaki, anpan (bean-filled bread), and dozens of other beloved preparations. The bean's naturally sweet, nutty flavour makes it the most suited of all pulses to sweet applications.

Nutritional Value of Adzuki Beans

Raw adzuki beans provide 329 kcal and 19.9 g of protein per 100 g, with 62.9 g of carbohydrates, 0.5 g of fat, and 12.7 g of fibre. When cooked: approximately 128 kcal, 7.5 g protein, and 5.4 g fibre per 100 g. Adzuki beans are an outstanding source of folate, manganese, potassium, phosphorus, iron, and zinc, with good thiamine (B1) and riboflavin (B2) content. They are among the easier pulses to digest — their relatively lower fibre and different carbohydrate composition compared to larger beans means they produce less gas than beans like kidney or black beans.

How to Cook Adzuki Beans

Adzuki beans do not require soaking though soaking for a few hours speeds cooking. Simmer in plenty of water for forty-five to sixty minutes until completely tender. For sweet red bean paste (anko): cook until very soft, drain most of the water, and mash while adding sugar gradually over low heat, stirring constantly until the mixture thickens to a smooth, fragrant paste. Use to fill mochi, steamed buns, or spread on toast with butter (an unusual but genuinely delicious combination). For savoury use: add to soups and grain dishes, or cook in the style of other beans with Asian aromatics — soy, ginger, garlic — for a Japanese-inspired side.