Food
Nasu (Japanese Eggplant)
茄子 (Nasu)
Also known as: Solanum melongena, Japanese Eggplant
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| Category | Food |
|---|---|
| Origin | Vegetable (Solanum melongena); primarily Kochi, Kumamoto, Gunma, Fukuoka, Tochigi. Cultivars: chu-naga (medium-long, standard), maru-nasu (round, Kyoto-style), beinasu (American-style), Yonezawa-nasu (small for pickle) |
| Typical functions | Fresh consumption (grilled, in nimono, in tempura), Tsukemono pickle substrate (shibazuke, asazuke), Frozen-vegetable input for foodservice OEM |
| Regulatory status in Japan | Permitted as a food ingredient under the Food Sanitation Act. No category-specific restrictions for ordinary culinary use. |
Nasu (Japanese eggplant) supplies a substantially larger fresh-pack retail and pickle-OEM market than the European or Mediterranean eggplant category does in those markets. For OEM buyers, nasu is the substrate for shibazuke (Kyoto-style pickle), the input for frozen-vegetable mabo-nasu prepared-meal OEM, and the basis for an increasing volume of nasu-tempura ready-food product. Regional cultivar branding — Kyoto kamo-nasu, Yamagata Yonezawa-nasu, Kumamoto hego-nasu — distinguishes premium routes from the volume supply.
Classification
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Common OEM product categories
Finished-product categories where Japanese OEM manufacturers commonly formulate with this ingredient.
- Fresh-pack nasu retail (chu-naga, mini cultivars)
- Tsukemono (pickled nasu) OEM, particularly shibazuke
- Frozen sliced / cubed nasu for foodservice
- Mabo-nasu and prepared-meal nasu OEM
Ingredient profile
Nasu (Solanum melongena) is the eggplant species across cultivar groups: chu-naga (medium-long, the volume Japanese cultivar), maru-nasu (round, used for Kyoto kamo-nasu and dengaku preparations), bei-nasu (American-style, longer and lighter), and small-fruit cultivars (Yonezawa-nasu, used for asazuke pickle). Each cultivar differs in skin texture, flesh density, and culinary application.
Nasu contains anthocyanins (nasunin) in the skin, responsible for the characteristic deep purple colour, plus polyphenols and a range of B vitamins. Industrial OEM processing typically uses field-trimmed chu-naga material for frozen-vegetable and prepared-meal lines, and small-fruit cultivars for pickle OEM. Kyoto kamo-nasu is reserved primarily for foodservice and gift-product channels.
OEM applications
In Japanese food OEM, nasu appears as fresh-pack retail (volume category for chu-naga); as the substrate for shibazuke and asazuke pickle OEM; as frozen sliced or cubed nasu for foodservice mabo-nasu chain supply and meal-kit applications; as mabo-nasu, agedashi-nasu, and nasu-no-takisuke prepared-meal OEM; and as nasu-tempura prefabricated frozen-food product.
Regional cultivar branding matters commercially. Kamo-nasu (Kyoto) is the premium round-cultivar substrate for high-end OEM. Yonezawa-nasu (Yamagata) is a small-fruit cultivar used for asazuke pickle OEM, often gift-positioned. Hego-nasu (Kumamoto) is a long-cultivar used in regional pickle OEM. Standard chu-naga from Kochi, Kumamoto, and Gunma supplies the volume retail and frozen-vegetable categories.
Regulatory classification in Japan
Nasu as fresh vegetable, frozen vegetable, and processed pickle is subject to the Food Sanitation Act including residual pesticide standards and additive regulation for any preservatives, salt content, or seasonings used during pickle processing.
Functional claims linking nasu to specific physiological functions require Foods with Functional Claims notification with supporting evidence; ordinary food labelling cannot make therapeutic claims about anthocyanin or polyphenol content.
Regulatory classification in other markets
| Global | Fresh and processed nasu is allowed in most destination markets subject to plant-quarantine requirements. Frozen nasu and processed mabo-nasu exports to US, EU, ASEAN, and Australia / NZ are subject to standard food-labelling rules including allergen declaration where seasoning includes soy, sesame, or other allergens. |
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Market reference formulations
Example finished products will be added after verification of cultivar (chu-naga / kamo / Yonezawa), prefecture of origin, and processing method (fresh / pickled / frozen / prepared-meal) per the editorial policy.
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Quick answers
- What is Nasu (Japanese Eggplant)?
- Nasu (Japanese eggplant) supplies a substantially larger fresh-pack retail and pickle-OEM market than the European or Mediterranean eggplant category does in those markets. For OEM buyers, nasu is the substrate for shibazuke (Kyoto-style pickle), the input for frozen-vegetable mabo-nasu prepared-meal OEM, and the basis for an increasing volume of nasu-tempura ready-food product. Regional cultivar branding — Kyoto kamo-nasu, Yamagata Yonezawa-nasu, Kumamoto hego-nasu — distinguishes premium routes from the volume supply.
- What is the regulatory status of Nasu (Japanese Eggplant) in Japan?
- Permitted as a food ingredient under the Food Sanitation Act. No category-specific restrictions for ordinary culinary use.
- What products typically use Nasu (Japanese Eggplant)?
- Fresh-pack nasu retail (chu-naga, mini cultivars) / Tsukemono (pickled nasu) OEM, particularly shibazuke / Frozen sliced / cubed nasu for foodservice / Mabo-nasu and prepared-meal nasu OEM
- Where does Nasu (Japanese Eggplant) come from?
- Vegetable (Solanum melongena); primarily Kochi, Kumamoto, Gunma, Fukuoka, Tochigi. Cultivars: chu-naga (medium-long, standard), maru-nasu (round, Kyoto-style), beinasu (American-style), Yonezawa-nasu (small for pickle)
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References
Last updated: 2026-05-30. Ingredient entries are reviewed at least annually against current regulatory listings.