Aznis from Celnat is particularly digestible and very appreciated for its sweet flavor. You can eat them hot or cold as a salad. The Japanese azuki bean is a species of annual climbing plant. The most common varieties are red, but there are also seeds of different colors (white, gray, black, spotted.). It is recommended to soak overnight, discard the soaking water and cook for about 1 hour and a half over low heat in a large volume of water, covering. Add salt at the end of cooking.