Black soybeans have been cultivated and enjoyed in Japan for over 1,000 years. During the Edo period, they were even presented as a tribute to the Tokugawa shogunate, highlighting their value and cultural significance.

In Yakuzen (based on traditional Chinese medicine), natural aging is closely linked to kidney health. According to traditional theory, black-colored foods are believed to support the kidneys—and black soybeans are a prime example. They’re known to help promote healthy urination, one of the kidneys’ key functions. This can be especially beneficial for relieving fluid retention, including symptoms like swelling (edema) and joint discomfort.

Black soybeans are also packed with antioxidants, high-quality protein, dietary fiber, and essential minerals such as iron and potassium—making them a great choice for both wellness and nutrition.

How can you enjoy them?
Roasted black soybeans are easy to make at home and can be eaten as a crunchy, nutritious snack. You can also brew them into a mild, toasty tea known for its comforting flavor and health benefits.

Yakuzen Classifications
Nature – Neutral (平)
Channels – Spleen (脾), Kidney (腎), Large intestine (大腸)
Flavor – Sweet (甘)

How do black soybeans help you?

1. Improve blood circulation and eliminate toxins
2. Improve urine flow and relieve fluid retention
3. Nourish yin and blood

Good for the following symptoms

1. Edema
2. Joint discomfort due to fluid retention
3. Irregular period due to iron deficiency
4. Fatigue

Cautions

It's very important to know about your body conditions before choosing foods.
Do not eat too much of particular foods at once.
Do not eat the foods you are allergic to.
There are foods to avoid if you are pregnant / have a disease. Ask your doctor before you start Yakuzen.