Super Ubi Ungu-Ayumurasaki Variety Sweet Potato

‘Ayamurasaki’ (purple sweet potato) is a Japanese sweet potato (satsumaimo) cultivar known for its deep purple skin and flesh and very high anthocyanin content — making it valued both for culinary use and as a source of natural purple pigment for foods and beverages.

🍠 What Ayamurasaki Is

‘Ayamurasaki’ is a cultivar of Ipomoea batatas (sweet potato) that was developed in Japan and released in 1995 by research programs at institutions such as KARC/NARO (Kyushu Agricultural Research Center / National Agriculture and Food Research Organization).

• Purple skin and flesh: The tubers show a deep, uniform violet-purple color both outside and inside, which comes from abundant anthocyanin pigments.
• Cultivar purpose: It was developed mainly for processing and uses where the intense purple color is desirable, such as in purple sweet potato powder, pigments, beverages, confectionery, and specialty foods.

🌟 Key Traits & Characteristics

🟣 Color & Pigments

• Very high anthocyanin content: Much higher than many other purple sweet potato varieties — about five times that of older types like ‘Yamagawamurasaki’.
• Deep purple flesh and skin: The color remains vivid even after cooking or processing, making it attractive in foods.

📈 Agricultural & Growth Traits

• Elongated fusiform roots: The storage roots are long and spindle-shaped.
• Yield & storage: Higher yield compared with some older cultivars like ‘Kokei No.14’, with moderate sprouting and reasonably good storage ability.
• Slight pest resistance: Shows slight resistance to some nematodes (e.g., root-knot nematode).

🍽️ Culinary & Processing Uses

• Table and processed foods: Used both as a table sweet potato and in processed products — especially where natural purple color is desired.
• Color source: The anthocyanin-rich flesh makes it useful as a natural food colorant and in beverages, purees, powders, sweets, and baked goods.

🧪 Why the Purple Color Matters

• Anthocyanins are polyphenol pigments with antioxidant properties, and deep-purple sweet potatoes like Ayamurasaki have much more of them than typical yellow or orange types.
• The strong pigmentation makes Ayamurasaki especially popular for visually striking desserts, natural food dyes, health-oriented products, and ingredient extraction.

🧑‍🍳 Typical Uses in Food

• Roasted or baked: Like other sweet potatoes, can be roasted whole as a snack or dessert.
• Purees and pastes: Blended into smooth purées for pastries, ice creams, sauces, or sweet breads.
• Processed products: Extracts used in drinks, color-enhanced sweets, and specialty confections.

🍠 Nutritional Highlights (general traits for purple sweet potatoes)

Purple sweet potatoes in general — including cultivars like Ayamurasaki — tend to deliver:

• Antioxidants (anthocyanins)
• Dietary fiber
• Vitamin C and potassium
• Natural sweetness with complex flavor