Food · Fermented seasonings
Tamari Soy Sauce
たまり醤油 (Tamari shōyu)
Also known as: Tamari, Tamari Shōyu, Whole-Soybean Soy Sauce
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| Category | Food |
|---|---|
| Japanese labeling name | たまりしょうゆ |
| Common Japanese notations | たまり醤油, 溜まり醤油, 溜醤油 |
| Origin | Fermented (almost entirely soybeans, with little or no wheat; salt; water) |
| Typical functions | Concentrated umami soy sauce, Gluten-free alternative to koikuchi (when wheat-free), Premium dipping and finishing sauce |
| Regulatory status in Japan | Standardized under the JAS standard for soy sauce. Approximately 1–2% of total Japanese soy sauce production. Production is concentrated in central Japan, particularly Aichi (Hatchō / Okazaki area), Mie, and Gifu. |
Tamari shōyu (たまり醤油) is a soy sauce made almost entirely from soybeans, with little or no wheat. It originated as the liquid that pooled ("tamaru" 溜まる, to accumulate) on top of fermenting Hatchō miso (mame miso) — a traditional fermentation centered on Aichi Prefecture's Okazaki area. Modern tamari is brewed as a soy sauce in its own right but retains the same wheat-free or low-wheat character. Its near-absence of wheat makes tamari the basis of most gluten-free Japanese soy sauce positioning in export markets.
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Classification
Tags below link to other ingredients sharing the same attribute, so you can pivot from one ingredient to its peers.
Product applications
Functions
Regulatory tags
Common OEM product categories
Finished-product categories where Japanese OEM manufacturers commonly formulate with this ingredient.
- Sashimi and sushi dipping soy sauce
- Gluten-free Japanese seasoning (export)
- Premium finishing sauce
Ingredient profile
Tamari is brewed primarily from cooked soybeans inoculated with Aspergillus oryzae (or A. sojae) koji, mixed with brine to form moromi, and fermented over an extended period before pressing. Traditional tamari recipes use no wheat; some commercial recipes include a small percentage of wheat (under 10%) for processing reasons. JAS-classified tamari is permitted with a wheat content lower than koikuchi but the threshold for 'gluten-free' on export labels typically requires verification of zero or trace wheat per supplier specification.
The fermentation is typically 1–3 years for traditional Aichi-region tamari, considerably longer than mass-produced koikuchi. The resulting product is darker, thicker, and richer in umami than koikuchi, with a more concentrated soybean character.
Tamari production is historically and culturally tied to the Hatchō miso tradition of Okazaki, Aichi — many Aichi-area soy sauce breweries also produce mame miso. Mie and Gifu Prefectures are the other significant production areas.
OEM applications
Traditionally, tamari is the standard dipping sauce for sashimi and sushi in central Japan (Chubu region), valued for its concentrated umami that complements raw fish without overwhelming it.
Internationally, tamari is the principal Japanese soy sauce category marketed to gluten-free and health-conscious consumers. Buyer specifications should always verify wheat content per producer rather than assuming all tamari is gluten-free.
In OEM, tamari is used for premium dipping-sauce finished products, certain teriyaki-style glazes where richer color and flavor are wanted, and as a finishing element in restaurant-grade sauces.
Regulatory classification in Japan
Tamari is one of the five JAS-defined soy sauce varieties (alongside koikuchi, usukuchi, saishikomi, and shiro) under the Japanese Agricultural Standard for soy sauce.
Tamari's compositional standard specifies higher total nitrogen content (umami compounds) than koikuchi, reflecting the concentrated soybean fermentation.
Allergens: soy must always be declared. Wheat declaration depends on whether wheat is present in the specific recipe — buyers requiring strict gluten-free positioning should request producer certification.
Regulatory classification in other markets
| EU | Imported as a fermented soy sauce. Wheat-free tamari can be marketed as gluten-free if it meets the EU threshold (gluten content below 20 mg/kg per Regulation (EC) No 41/2009). Producer-side verification required. |
|---|---|
| USA | Tamari that meets the FDA gluten-free threshold (less than 20 ppm gluten) can be labeled gluten-free per 21 CFR 101.91. Many tamari export products are sold under gluten-free positioning in the US natural-foods category. |
| China | Imported under GACC rules for fermented condiments. Less culturally established than koikuchi in Chinese retail. |
| Korea | Imported as a fermented soy sauce; specialty category rather than mainstream retail. |
Market reference formulations
Example finished products will be added after verification of wheat content and gluten-free certification status per producer.
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.
Typical OEM use levels
Formulation ranges per finished-product application. Verify against the cited source before production.
| Application | Typical range | Regulatory limit | Notes |
|---|---|---|---|
| Standard JAS tamari-shoyu compositional spec | Total nitrogen ≥1.60% (特級), ≥1.40% (上級), ≥1.20% (標準級) | Salt 16–17% typical | Made primarily from soybean (minimal wheat); higher umami / gluten-free positioning(JAS 醤油規格 (平成16年9月13日 農林水産省告示第1703号; 品質表示基準は第1704号)) |
Certifications commonly available
Certification schemes commonly obtainable for this raw material. Always confirm the specific supplier's current certificate before contracting.
| Scheme | Availability | |
|---|---|---|
| Organic JAS | Common | |
| Gluten-free | Common | Tamari is traditionally low-/no-wheat; key advantage over koikuchi for gluten-free positioning |
| Halal | On-request | |
| Kosher | On-request | |
| Vegan | Inherent |
Alternative ingredients
Related ingredients commonly evaluated as substitutes.
Quick answers
- What is Tamari Soy Sauce?
- Tamari shōyu (たまり醤油) is a soy sauce made almost entirely from soybeans, with little or no wheat. It originated as the liquid that pooled ("tamaru" 溜まる, to accumulate) on top of fermenting Hatchō miso (mame miso) — a traditional fermentation centered on Aichi Prefecture's Okazaki area. Modern tamari is brewed as a soy sauce in its own right but retains the same wheat-free or low-wheat character. Its near-absence of wheat makes tamari the basis of most gluten-free Japanese soy sauce positioning in export markets.
- What is the regulatory status of Tamari Soy Sauce in Japan?
- Standardized under the JAS standard for soy sauce. Approximately 1–2% of total Japanese soy sauce production. Production is concentrated in central Japan, particularly Aichi (Hatchō / Okazaki area), Mie, and Gifu.
- What products typically use Tamari Soy Sauce?
- Sashimi and sushi dipping soy sauce / Gluten-free Japanese seasoning (export) / Premium finishing sauce
- Where does Tamari Soy Sauce come from?
- Fermented (almost entirely soybeans, with little or no wheat; salt; water)
- What is the INCI / JSCI labeling name for Tamari Soy Sauce?
- JSCI: たまりしょうゆ
Related ingredients — substitutes, pairings, processing chain
Substitutes
Interchangeable alternatives for similar applications. Mind price, flavor, and regulatory differences.
Often used with
Ingredients frequently paired in the same recipe or formulation.
Same category
Other ingredients in the same sub-category.
Hon-Mirin
本みりん
Koikuchi Soy Sauce (Dark Soy Sauce)
濃口醤油
Light-Color Salty Rice Miso (Kome Miso, Tanshoku Karamiso)
米みそ 淡色辛みそ
Mugi Miso (Barley Miso)
麦みそ
Red Rice Miso (Kome Miso, Akairo Karamiso)
米みそ 赤色辛みそ
Saishikomi Soy Sauce (Twice-Brewed)
再仕込み醤油
Hatcho Miso
八丁味噌
Kioke-Aged Soy Sauce
木桶仕込み醤油
Aspergillus Oryzae Ferment
麹
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Manufacturers mentioning this ingredient
Japanese OEM factories whose published profile references this ingredient. Auto-detected from manufacturer descriptions; verify capabilities directly.
Related guides & how-to
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Regulatory guidance
Take the next step
FAQ for OEM buyers
Q. Is all tamari soy sauce gluten-free?
No — not all tamari is wheat-free. Traditional Aichi-area tamari is brewed entirely from soybeans (no wheat), but some commercial tamari recipes include a small wheat percentage (under 10%). Buyers seeking gluten-free positioning should always request producer certification confirming gluten content below the destination market's threshold (20 mg/kg in the EU and US, 20 ppm for FDA gluten-free labeling).
Sources · Last reviewed: 2026-04-28
- JAS standard for soy sauce — tamari compositional specifications
- FDA gluten-free labeling regulation 21 CFR 101.91
Q. Why is tamari richer in umami than koikuchi?
Tamari is brewed almost entirely from soybeans (versus the 50:50 soybean–wheat ratio of koikuchi). Soybeans contribute most of the amino-acid umami compounds in soy sauce; the wheat in koikuchi contributes aromatic and sweet notes from sugars but less umami. Combined with longer fermentation (often 1–3 years), tamari concentrates total nitrogen and free amino acids, producing a richer umami profile per volume.
Sources · Last reviewed: 2026-04-28
- JAS standard for soy sauce — total nitrogen specifications by variety
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References
- JAS standard for soy sauce (しょうゆの日本農林規格)
- Aichi Prefecture mame miso and tamari industry documentation
- 文部科学省 (Ministry of Education, Culture, Sports, Science and Technology) Standard Tables of Food Composition — tamari soy sauce (17009)
Last updated: 2026-04-28. Ingredient entries are reviewed at least annually against current regulatory listings.