Don't throw it away. "Nippon no Genki (Japan's energy)" comes from the sweet potato skin.

Sweet potatoes are rich in dietary fiber. When you cut sweet potatoes, the milky white liquid oozing out from the surface is called "Yarapin". It’s only contained in sweet potatoes, has the effect of protecting the mucosa of the stomach, and allows a smooth bowel movement. This “Yarapin” is abundantly found, especially, in the skin of sweet potatoes.

Because the color darkens or the texture gets bad, many companies and families peel off the skin and throw it away.

Wild animals, who know what they need for their bodies, eat the skin.
We, humans, are the ones that are throwing away the high-quality nutritious skin by wasting time and money because of its appearance. Throwing away such valuable things is not good for the body or the earth. We felt the need to convey this reality more.

At Kairen, the whole sweet potato is made use of. Not only the flesh but also the nutritious skin.
We care for everyone's well-being, that is why we encourage people to eat ingredients, such as Yarapin, to become healthy. We are delivering a wide range of innovative products, one after another, taking advantage of the whole value of sweet potatoes. We hope to contribute to the health of people and energize Japan with our products.

The "Skin" Contains "The Power of Sweet Potato"

We recommend people eating the "skin" instead of peeling it away.
Let's become beautiful and energized!

With the power of sweet potatoes, be beautiful and healthy!

Sweet potatoes are highly capable of absorbing sunlight, they grow durably, even in volcanic ash, and are strong against typhoons. They are the exact crop suitable for the southern Kyushu climate. They’re rich in nutritional value and are also known as an excellent health food ingredient containing a lot of carbohydrates, starch, minerals, vitamins, and dietary fibers.

At Kairen, the whole sweet potato is made use of. Not only the flesh but also the nutritious skin.

Sweet potatoes are rich in vegetable fiber that also helps relieve constipation.
Vegetables and fruits are said to have an abundance of nutrition between their skin and flesh.
Sweet potatoes are also known for having "Yarapin" and many other wonderful nutrients contained near the skin. Also, the skin contains enzymes that break down the starch, improves digestion and prevents the development of gas.
The sweet potatoes of Kairen utilize the whole sweet potato, including the skin. You can take in all of the delicious nutrients.

【Delicious and Healthy. Sweet Potatoes' Nutrients】

Energy 131kcal (steamed) Water 66.4g Protein 1.2g Lipids 0.2g Carbohydrates 31.2g Dietary Fiber 3.8g Carotene 27μg Vitamin E 1.5mg Vitamin B1 0.1mg Vitamin B2 0.03mg Vitamin B6 0.23 mg Folic Acid 46μg Niacin 0.7mg Pantothenic Acid 0.97mg Vitamin C 20mg Sodium 4mg Potassium 490mg Calcium 47mg Magnesium 19mg Phosphorous 42mg Iron 0.6mg Zinc 0.2mg Copper 0.17mg Manganese 0.5mg

Sweet potatoes contain a lot of potassium, calcium, vitamins, and they are also called a quasi-complete food because of their good nutritional balance. Because they contain an abundance of dietary fiber, it helps to prevent and relieve constipation. Since starch, which is the main ingredient, protects the abundance of vitamin C in the sweet potatoes, it helps to protect the decrease of vitamin C due to cooking.

Main active ingredients contained in sweet potatoes and their functions

Dietary Fiber

1. Suppression of cholesterol and lipid absorption, lowering of blood cholesterol by promoting excretion
2. Prevention of diabetes by delaying absorption of sugar
3. Prevention of overeating due to an increase in chewing frequency and an increase of volume in the stomach
4. Preventing colorectal cancer, etc. by balancing intestinal bacteria, activating intestinal functions and improving bowel movements

*Reference materials
Kagoshima prefecture Ibusuki-shi agriculture and livestock industry https://www.city.ibusuki.lg.jp/main/machi/nouchiku/page004676.html