Sourcing yuzu kosho wholesale looks like a simple condiment buy — three ingredients, a small jar, a cult chef following. The complication is entirely on the US compliance side, and it hinges on one classification question that most exporters answer wrong: is your yuzu kosho an FDA acidified food or an acid food? Get that determination right and your import paperwork is ordinary. Get it wrong and you either waste months on a process filing you never needed, or you ship a regulated low-acid product with no scheduled process and invite detention. This is the briefing I give every buyer before their first yuzu kosho order leaves Kyushu.
I source condiments and seasonings directly from makers across Kyushu and western Japan for restaurant groups, specialty retailers and private-label brands in the US, UK and EU. Below is how the regulatory, tariff and shelf-life pieces actually fit together for this product.
What is yuzu kosho, and who buys it wholesale?
Yuzu kosho is a fermented paste of yuzu citrus peel, fresh chili peppers and salt that originated in the Kyushu region of southern Japan, where it has been a household condiment for generations. Despite the name — kosho (胡椒) is the ordinary Japanese word for pepper — there is no black pepper in it; in the Kyushu dialect kosho historically referred to chili. Green yuzu kosho uses unripe green chilis and green yuzu; the red version uses ripe red chilis. It is salt-cured and lightly fermented, which is why a tiny amount delivers an intense, bright, citrus-forward heat that chefs use on yakitori, nabe, sashimi, tempura and increasingly in dressings, butters and cocktails.
On the B2B side, three buyer types drive demand: restaurant groups that want an authentic Kyushu product rather than a US-made imitation; specialty grocery and gourmet retailers building a Japanese-pantry set; and private-label or OEM brands that want to bottle a yuzu kosho under their own name. The last group is where the compliance questions get sharpest, because a private-label buyer is taking on more of the importer-of-record responsibility than they often realize.
The classification that decides your paperwork: acid food vs. acidified food
The single most important fact about importing yuzu kosho is that FDA treats acid foods and acidified foods completely differently, and most yuzu kosho is closer to the exempt category than people assume. Under 21 CFR 114.3, an acidified food is a low-acid food (one with a natural equilibrium pH above 4.6) to which acid or acid foods are added so that the finished product has an equilibrium pH of 4.6 or below and a water activity greater than 0.85. An acid food, by contrast, is naturally at or below pH 4.6 on its own — and acid foods are exempt from the acidified-foods canning regulations.
Here is what most exporters won't tell you, because "you need full FDA acidified-foods registration" is the cautious thing to say: traditional yuzu kosho is not obviously an acidified food at all. The acidity comes from the yuzu — a genuinely sour citrus — not from added vinegar or citric acid, which points toward the acid food category rather than the acidified one. And even where some acid is added, the product's very high salt content frequently pulls water activity down to or below the 0.85 threshold that is part of the acidified-food definition in the first place. A food below that water-activity line sits outside 21 CFR 114 by definition. So a typical salt-heavy Kyushu yuzu kosho can land outside the acidified-foods rule on either of two independent grounds.
That is the good news. The catch is that "probably exempt" is not a compliance position. You cannot reason your way out of a process filing with a paragraph like this one — you need numbers.
How to document your way out of (or into) 21 CFR 114
To know which rulebook applies, get a qualified process authority to measure your specific product's finished equilibrium pH and water activity, then classify from the result. Do not classify from the recipe or from what a competitor declared. Small changes — more or less salt, riper chilis, a splash of yuzu juice versus peel only — move both numbers. The table below is the decision framework I hand buyers and their process authority.
| Category | How it gets acidic | Finished pH | Water activity (aw) | 21 CFR 114 process filing? |
|---|---|---|---|---|
| Acid food | Naturally acidic (e.g., yuzu itself) | ≤ 4.6 naturally | Any | No — exempt from acidified-foods rule |
| Acidified food | Low-acid base + added acid | ≤ 4.6 (after acid added) | > 0.85 | Yes — Form FDA 2541e, scheduled process |
| Low-acid (LACF) | Not acidified | > 4.6 | > 0.85 | Yes — different rule (21 CFR 113) |
| Outside both | High salt/sugar lowers aw | Any | ≤ 0.85 | No — falls outside the definition |
If your lab work lands you in the acidified-food box, the obligations are real: the processor must register the establishment and file a scheduled process for each product and container on Form FDA 2541e, the process must be established by a qualified process authority, and the operator overseeing it generally needs Better Process Control School certification. For a Japanese maker that has never sold a shelf-stable canned or jarred product into the US, that is a meaningful project — budget time for it rather than discovering it at the port. The FDA's establishment-registration and process-filing page is the authoritative starting point, and the controlling definitions live in 21 CFR 114.3.
What every importer needs regardless of the acid question
No matter how your yuzu kosho classifies, three FDA requirements apply to it as an imported food, and skipping any one of them is the most common reason a shipment is held. First, the foreign manufacturer must have a current FDA food facility registration (renewed biennially), and you, the importer, must operate a Foreign Supplier Verification Program (FSVP) — naming a US FSVP importer with a US address, and keeping verification records on file. Second, Prior Notice must be filed for each shipment before it arrives. Third, the supply chain has to satisfy FSMA preventive-controls expectations (CGMP & PC).
The practical failure I see is the private-label buyer who assumes the Japanese maker "handles FDA." The maker handles its own facility registration; the importer owns FSVP and Prior Notice. Decide who the FSVP importer of record is before you place the order, not after. My Japan food export documents checklist lays out the registration, labeling and shipment paperwork I assemble for a first-time condiment importer.
Tariff and HTS: where yuzu kosho lands in 2026
Yuzu kosho is typically classified under HTS heading 2103 — "sauces and preparations therefor; mixed condiments and mixed seasonings" — most often the residual subheading 2103.90. The general (Column 1) duty on that "other" line has historically sat around 6.4% ad valorem, well below 15%. That base rate is exactly why the 2025 reciprocal tariff matters here, in contrast to a product like porcelain that was already above 15%.
Under the US–Japan reciprocal-tariff framework (the customs mechanics took effect September 16, 2025), the rule is arithmetic: for a product of Japan whose Column 1 rate is below 15%, an additional duty is added so the total equals 15%; for a product already at or above 15%, no additional duty applies. Because yuzu kosho's base rate is well under 15%, its landed duty is topped up to 15% — a real increase from the historic ~6.4%. Confirm the exact line and current rate for your specific formulation on the USITC Harmonized Tariff Schedule and with your broker; sauces and seasonings have several sub-lines, and a paste with a dominant ingredient can occasionally be classified elsewhere. My 2026 tariff overview for wagyu, matcha and nori tracks how this framework is repricing Japanese food categories across the board.
Sourcing, salt and shelf life
Yuzu kosho is salt-preserved, so its shelf life is long but its quality window is shorter — buy on freshness and aroma, not just on the printed date. Unopened and stored cool and dark, a commercial jar typically keeps about a year; once opened it should be refrigerated and used within roughly two months for peak aroma, though the salt keeps it safe well beyond that. For wholesale programs, three sourcing variables matter most.
| Variable | Green yuzu kosho | Red yuzu kosho |
|---|---|---|
| Chili / yuzu | Unripe green chili + green yuzu | Ripe red chili + ripe yellow yuzu |
| Flavor profile | Sharper, brighter, more herbaceous heat | Rounder, deeper, slightly sweeter heat |
| Typical use | Sashimi, nabe, white-fleshed fish, dressings | Grilled meats, richer braises, sauces |
| Color stability | Green can dull over time/heat | More stable in cooked applications |
Beyond color, ask the maker for the actual salt percentage (it varies widely and drives both flavor intensity and that water-activity number above), whether the chilis and yuzu are domestically grown and from which prefecture, and whether the product is pasteurized or raw-fermented — the latter changes both flavor and shelf-stability assumptions. The yuzu-growing belt runs through Kochi, Tokushima and Kyushu, and a maker who can name the farm behind the peel is usually the maker worth shortlisting. The same supplier diligence I apply across categories — sample discipline, honest MOQs, document fluency — is in my how to choose a Japanese supplier guide.
Frequently Asked Questions
Is yuzu kosho an FDA acidified food?
Often not. An acidified food is a low-acid food to which acid is added to reach pH 4.6 or below with water activity above 0.85. Traditional yuzu kosho gets its acidity naturally from the yuzu, which points to the exempt "acid food" category, and its high salt often pushes water activity to or below 0.85, placing it outside the acidified-food definition. You must confirm with measured pH and water activity from a process authority, not from the recipe.
What FDA paperwork do I need to import yuzu kosho to the USA?
Regardless of the acidified-food question, the foreign facility needs a current FDA food facility registration, you need a Foreign Supplier Verification Program (FSVP) with a named US importer, and Prior Notice must be filed for each shipment. If lab results classify the product as an acidified food, add a scheduled process and Form FDA 2541e filing on top.
What is the HTS code and import duty for yuzu kosho in 2026?
Yuzu kosho is usually classified under HTS heading 2103 (sauces, mixed condiments and seasonings), commonly subheading 2103.90, whose general rate has historically been around 6.4%. Because that is below 15%, the US–Japan reciprocal-tariff framework tops the total duty up to 15%. Confirm your exact line on the USITC HTS and with your customs broker.
What is the difference between green and red yuzu kosho?
Green yuzu kosho is made with unripe green chilis and green yuzu and tastes sharper and more herbaceous; red yuzu kosho uses ripe red chilis and ripe yuzu and is rounder and slightly sweeter. Green suits raw and delicate dishes; red holds up better in cooked and grilled applications.
How long does yuzu kosho last, and how should it be stored?
Unopened and kept cool and dark, a commercial jar typically lasts about a year. After opening, refrigerate it and use within roughly two months for best aroma; the high salt content keeps it safe considerably longer, but the bright citrus note fades.
Can I private-label yuzu kosho from a Japanese maker?
Yes, and many Kyushu makers offer OEM runs, but as the private-label brand you typically become the importer of record and own the FSVP and Prior Notice obligations. Settle US labeling (ingredient and allergen statements, net weight, your responsible-party address) and the acidified-vs-acid determination before committing to a production run.
