Food · Fermented foods

Sasage (Cowpea / Black-eyed Peas)

ささげ (Sasage)

Also known as: Sasage, Cowpea, Black-eyed peas, Vigna unguiculata, ササゲ, ジュロクササゲ (16-pod cowpea), 白ささげ (white cowpea)

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At a glance

Category	Food
Japanese labeling name	ささげ
Common Japanese notations	ささげ, 大角豆, ササゲ, じゅうろくささげ
Origin	Cowpea (Vigna unguiculata); cultivated in Japan since the Heian period; modern domestic production small but distinctive — sasage is preferred over azuki for sekihan in some regions because the bean does not split during cooking; principal applications are sekihan (red bean rice) and traditional regional cooking
Typical functions	Sekihan (red bean rice) — preferred bean over azuki in some regions because skins do not split during cooking, Regional Japanese ceremonial cuisine — particularly Tohoku and Kanto, Mame-gohan-style preparations, Traditional Japanese pickled and simmered dishes
Regulatory status in Japan	Standard agricultural product labeling. Domestic vs imported origin disclosure appropriate. Sasage is not a designated allergen.

Sasage (ささげ) — cowpea / black-eyed peas (Vigna unguiculata) — is a smaller-volume but culturally significant Japanese bean, distinguished from azuki primarily by its split-resistance during cooking — for traditional sekihan (red bean ceremonial rice), some regions and traditional cooks specifically prefer sasage over azuki because azuki skins crack during the long cooking and the result is considered less auspicious (cracked beans suggest 'breaking', while intact beans suggest 'wholeness' for ceremonial occasions). The OEM positioning is regional/traditional specialty: as the preferred bean for Tohoku and Kanto regional sekihan (where the split-resistance preference is strongest), as a traditional Japanese ceremonial cuisine ingredient, and as a niche premium specialty for traditional cuisine retail. Total volume is small relative to azuki — sasage is not a volume commodity but a regional specialty.

Classification

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Product applications

Functions

Flavoring

Regulatory tags

Culinary ingredient

Origin

Plant-derived

Used in (typical product categories)

Finished-product categories that commonly include this ingredient in Japanese-market formulations.

Dry sasage retail (typically smaller package sizes than azuki)
Pre-cooked sasage sekihan retail
Traditional regional cuisine ingredient supply

What it is

Sasage is Vigna unguiculata, distinct from azuki (V. angularis). The most common Japanese cultivar group includes 'jūroku-sasage' (16-pod cowpea, named for the long pod containing many beans). The mature beans are typically smaller than azuki, with a deep red-brown color (with distinctive 'eye' marking) and tougher skin that resists splitting during cooking.

Nutritionally, dry sasage per 100g provides 280 kcal, 23.9g protein (notably high), 2.0g fat, 55.0g carbohydrates with 18.4g dietary fiber. Mineral content includes K 1400mg, Mg 170mg, P 400mg, Fe 5.6mg per 100g — broadly similar to azuki.

Production: domestic Japanese sasage is small in volume; some imported supply (China, USA, Africa) for cost-positioned applications. Domestic production is concentrated in regions with traditional sekihan cuisine preferences.

Typical uses in Japanese products

Sekihan with sasage — particularly in Tohoku and Kanto regions, traditional sekihan preparation uses sasage rather than azuki specifically because the skins do not split during cooking. The 'unbroken' beans are considered auspicious for ceremonial occasions (childbirth celebration, school graduation, weddings, New Year).

Traditional regional cuisine — sasage features in regional Japanese cooking traditions in various forms, including some local nimame and pickled-bean preparations.

Mame-gohan-style preparations — sasage cooked with rice in regional variations.

For OEM: dry sasage retail packs for traditional cooking applications, pre-cooked sekihan ready-meal retail (with sasage rather than azuki for traditional positioning), and regional traditional cuisine ingredient supply.

Regulatory classification in Japan

Standard agricultural product labeling. Domestic vs imported (China, USA, Africa) origin disclosure appropriate.

Distinction from azuki on labels is important — products marketing 'sekihan with sasage' should genuinely use sasage, not azuki.

Sasage is not a designated allergen.

Regulatory classification in other markets

EU	Imported as cowpea / black-eyed peas. Established global category.
USA	Black-eyed peas have established US Southern cuisine position. Japanese-origin niche specialty.
China	China has its own cowpea culture. Niche specialty positioning.
Korea	Niche specialty positioning.

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FAQ for OEM buyers

Q. Why do some regions prefer sasage over azuki for sekihan?

The preference for sasage (ささげ) over azuki for sekihan in Tohoku and Kanto regions is rooted in cultural symbolism around ceremonial occasions. Azuki, despite being the more famous Japanese red bean, has skins that tend to crack and split during the long cooking time required for sekihan. The cracked beans (in the Japanese cultural reading) suggest 'breaking,' 'splitting,' or imperfection — these connotations are inappropriate for ceremonial occasions like childbirth celebrations, school graduations, weddings, and New Year. Sasage, with its tougher skin, holds together intact through cooking, suggesting 'wholeness' and 'completeness' — more auspicious connotations for celebrations. This regional preference is strongest in Tohoku (where samurai tradition particularly disliked the 'split' connotation) and Kanto. Other regions (notably Kansai) traditionally use azuki for sekihan without concern about the connotation. For OEM positioning: sekihan products marketed for ceremonial occasions, particularly with Tohoku or traditional positioning, should consider using sasage; mainstream sekihan products use azuki. Clear ingredient disclosure is appropriate.

Sources · Last reviewed: 2026-04-28

Editorial — Japan sekihan regional tradition reference

References

MEXT Standard Tables of Food Composition — ささげ
Editorial — Japan sasage vs azuki sekihan tradition reference

Last updated: 2026-04-28. Ingredient entries are reviewed at least annually against current regulatory listings.