Food · Fermented foods
Tochi-no-mi (Japanese Horse Chestnut)
とちのみ (Tochi-no-mi)
Also known as: Tochi-no-mi, Japanese horse chestnut, Aesculus turbinata, 栃の実
Listed on the Sourcing platform — request supplier introductionsAt a glance
| Category | Food |
|---|---|
| Japanese labeling name | とちのみ |
| Common Japanese notations | とちのみ, 栃の実, トチノミ, とち餅 |
| Origin | Nut of the Japanese horse chestnut tree (Aesculus turbinata), wild-foraged in mountain regions; principal modern processing regions Tochigi (the prefecture is named after this tree), Gifu, Nagano, Niigata; total volume is small — a heritage food with distinctive bitter-tannin profile requiring elaborate processing |
| Typical functions | Tochi-mochi (栃餅) — premium traditional mountain-village mochi specialty, Tochi-okayu (tochi-flavored rice porridge) regional specialty, Mountain-village heritage cuisine positioning |
| Regulatory status in Japan | Standard agricultural product labeling. Volume is heritage-scale only. Tochi-no-mi requires extensive bitter-tannin removal (water-soaking / lye-treatment) before consumption — only properly processed product is food-safe. Tochi-no-mi is not a designated allergen. |
Tochi-no-mi (とちのみ / 栃の実) is the nut of the Japanese horse chestnut tree (Aesculus turbinata), historically a mountain-village staple food during difficult harvests, and now positioned as a heritage cuisine specialty. The OEM positioning is heritage mountain-village specialty: as the foundation of tochi-mochi (a defining traditional mochi specialty in Tochigi, Gifu, Nagano, and Niigata mountain regions), as tochi-okayu (rice porridge specialty), and as a heritage cultural-cuisine retail product. Critical processing requirement: raw tochi-no-mi contains intense bitter saponin and tannin compounds requiring elaborate processing (long water-soaking and traditional lye-treatment using wood ash) before consumption — only properly processed product is food-safe and palatable. Total volume is small — tochi-no-mi is exclusively heritage and regional specialty rather than industrial-scale ingredient.
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Classification
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Product applications
Functions
Regulatory tags
Origin
Common OEM product categories
Finished-product categories where Japanese OEM manufacturers commonly formulate with this ingredient.
- Tochi-mochi retail (Tochigi, Gifu, Nagano regional gift)
- Tochi-no-mi processed flour (small-scale specialty supply)
Ingredient profile
Tochi-no-mi is the seed of Aesculus turbinata, the Japanese horse chestnut tree. The nut is large, glossy brown when fresh, and contains intense bitter saponins and tannins that make it inedible without processing. Traditional processing involves long water-soaking (1-2 weeks of running water) and wood-ash lye treatment to remove bitterness and toxicity.
Production: Tochigi (the prefecture is named after the tree — '栃' character is in the prefecture name 栃木), Gifu, Nagano, and Niigata mountain regions are the established processing centers. Wild-foraged supply with limited semi-cultivated production.
Nutritional content (after processing) is broadly similar to other tree nuts — moderate carbohydrate, modest protein, low fat. Specific nutrition data limited due to artisanal scale.
OEM applications
Tochi-mochi (栃餅) — premium traditional mountain-village mochi where processed tochi-no-mi is pounded with mochi-rice, producing distinctive brown color, mildly bitter-aromatic flavor, and chewy texture. Tochigi, Gifu Hida-Takayama, Nagano, and Niigata regional specialty.
Tochi-okayu — regional rice porridge specialty.
Mountain-heritage cuisine — featured in mountain-village ryokan and traditional cuisine restaurants.
For OEM: tochi-mochi gift retail OEM (with regional production partnership), heritage cultural-cuisine specialty product collaboration.
Regulatory classification in Japan
Standard food labeling. Mountain-region origin (Tochigi / Gifu / Nagano / Niigata) appropriate for premium positioning.
Critical food safety: only properly processed tochi-no-mi is edible. Raw or insufficiently processed product is bitter and potentially harmful.
Tochi-no-mi is not a designated allergen.
Regulatory classification in other markets
| EU | Niche specialty positioning. |
|---|---|
| USA | Niche specialty positioning. Note that European horse chestnut (Aesculus hippocastanum) is toxic — Japanese A. turbinata after processing is distinct. |
| China | Niche specialty positioning. |
| Korea | Korea has its own tochi-no-mi tradition (도토리묵 acorn-related but distinct species). |
Market reference formulations
Example finished products will be added after verification of regional origin and processing authenticity.
All brand names and product names referenced anywhere on this site are the property of their respective owners. Example entries are provided for informational purposes only and do not imply endorsement.
Alternative ingredients
Related ingredients commonly evaluated as substitutes.
Quick answers
- What is Tochi-no-mi (Japanese Horse Chestnut)?
- Tochi-no-mi (とちのみ / 栃の実) is the nut of the Japanese horse chestnut tree (Aesculus turbinata), historically a mountain-village staple food during difficult harvests, and now positioned as a heritage cuisine specialty. The OEM positioning is heritage mountain-village specialty: as the foundation of tochi-mochi (a defining traditional mochi specialty in Tochigi, Gifu, Nagano, and Niigata mountain regions), as tochi-okayu (rice porridge specialty), and as a heritage cultural-cuisine retail product. Critical processing requirement: raw tochi-no-mi contains intense bitter saponin and tannin compounds requiring elaborate processing (long water-soaking and traditional lye-treatment using wood ash) before consumption — only properly processed product is food-safe and palatable. Total volume is small — tochi-no-mi is exclusively heritage and regional specialty rather than industrial-scale ingredient.
- What is the regulatory status of Tochi-no-mi (Japanese Horse Chestnut) in Japan?
- Standard agricultural product labeling. Volume is heritage-scale only. Tochi-no-mi requires extensive bitter-tannin removal (water-soaking / lye-treatment) before consumption — only properly processed product is food-safe. Tochi-no-mi is not a designated allergen.
- What products typically use Tochi-no-mi (Japanese Horse Chestnut)?
- Tochi-mochi retail (Tochigi, Gifu, Nagano regional gift) / Tochi-no-mi processed flour (small-scale specialty supply)
- Where does Tochi-no-mi (Japanese Horse Chestnut) come from?
- Nut of the Japanese horse chestnut tree (Aesculus turbinata), wild-foraged in mountain regions; principal modern processing regions Tochigi (the prefecture is named after this tree), Gifu, Nagano, Niigata; total volume is small — a heritage food with distinctive bitter-tannin profile requiring elaborate processing
- What is the INCI / JSCI labeling name for Tochi-no-mi (Japanese Horse Chestnut)?
- JSCI: とちのみ
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References
- 文部科学省 (Ministry of Education, Culture, Sports, Science and Technology) Standard Tables of Food Composition — とちのみ 蒸し
- Editorial — Japan tochi-mochi mountain-region heritage reference
Last updated: 2026-04-28. Ingredient entries are reviewed at least annually against current regulatory listings.