Technology · Agri-food systems / Food & alt-protein

Koji & fermented flavor-starter kits (consumer)

Aspergillus oryzae solid-state fermentation of steamed grain into koji, shio-koji, miso and amazake bases — sold as finished consumer flavor starters by Clearspring (UK organic miso), Omsom (Asian flavor starter kits, DayDayCook-acquired), Toiro (premium Japanese miso import), Umami Cartel (shio-koji) and South River Miso (craft handmade American miso since 1982).

Maturity 5/9 Risk: low Food ingredients Consumer & retail US · EU Science: why it works → verified 2026-07-27 · 5 Sources (0 independent)

1 · What it gives

Koji is the solid-state fermentation of steamed rice, barley or soybean by the filamentous fungus Aspergillus oryzae, producing the enzyme-active base for miso, shio-koji, amazake, tamari, sake and mirin. The consumer flavor-starter category packages koji-derived bases as finished retail products — bottled shio-koji seasoning, jarred miso paste, amazake drink bases and assembled flavor-starter kits — bringing Japanese fermentation technique to Western retail aisles. This article covers the consumer finished-product slice; contract fermentation bases sold B2B to food brands belong to fermented-food-ingredients-b2b, and live-culture lacto-fermented vegetables (kraut, kimchi) belong to traditional-fermentation. Hanamaruki’s 2026 rebranded liquid shio-koji global launch and DayDayCook’s acquisition of Omsom frame the category’s 2026 commercial momentum.

The key directions of koji consumer flavor starters are:

Shio-koji liquid seasoning (Shio-Koji Liquid Seasoning): Umami Cartel’s shio-koji sauce and Hanamaruki’s 2026 rebranded global liquid shio-koji — the ready-to-use koji-salt marinade that became the category’s breakout consumer format.
Premium Japanese miso import (Premium Japanese Miso Import): Toiro’s curated single-origin Japanese miso and Clearspring’s organic Japanese miso range — the premium white/barley miso pastes carrying koji fermentation into European and US retail.
Craft handmade American miso (Craft Handmade American Miso): South River Miso Company (Conway, Massachusetts; founded 1982), producing traditional wooden-vat handmade koji miso for the US craft market.
Asian flavor starter kits (Asian Flavor Starter Kits): Omsom’s sauce-and-seasoning starter kits for regional Asian cuisines (acquired by DayDayCook), extending koji-based umami into multi-cuisine home cooking.

Sectoral value chain#

[steamed rice / barley / soybean] ──> [Aspergillus oryzae inoculation] ──> [koji solid-state fermentation]
                                                                          │
                                                                  (enzyme-active koji)
                                                                          │
                                                                          ▼
[retail consumer pack] <─── [formulation into miso / shio-koji / amazake] <─── [harvest + blend]

Value chain levels#

Level	Description	Key inputs/outputs
Grain Preparation	washing, soaking and steaming rice, barley or soybean to gelatinise starches for fungal access	In: whole grain, water. Out: steamed substrate.
Koji Inoculation	inoculation with Aspergillus oryzae spore culture (tane-koji), typically from a starter supplier	In: steamed grain, tane-koji. Out: inoculated substrate.
Solid-State Fermentation	40–50 hour incubation in wooden or tray bioreactors at 30–35 C with controlled humidity and aeration	In: inoculated substrate. Out: enzyme-active koji (amylase, protease).
Harvest & Formulation	blending finished koji into miso (with salt and soybean), shio-koji (with salt and water) or amazake (with water)	In: koji, salt, soybean, water. Out: miso / shio-koji / amazake base.
Maturation & Packaging	ageing miso in wooden vats (weeks to years), then bottling shio-koji or jarring miso for retail	In: formulated base, packaging. Out: retail consumer pack.
Retail Distribution	distribution through specialty, natural-food and mainstream retail plus direct-to-consumer e-commerce	In: retail packs, cold chain. Out: consumer koji product purchases.

Cross-cutting technologies of the sector:

Tane-koji starter culture (Tane-Koji Starter): the Aspergillus oryzae spore inoculum supplied by specialist starter houses (e.g. startercultures.eu), the upstream input all koji production depends on.
Wooden-vat fermentation (Wooden-Vat Fermentation): traditional cedar or cypress vats (South River Miso, Japanese craft producers) that host the microbial ecology shaping koji flavor, distinct from stainless-steel tray bioreactors.
Cold-chain shio-koji bottling (Shio-Koji Bottling): pasteurisation-free or lightly pasteurised bottling that preserves koji’s live enzyme activity for retail shelves.

2 · What it replaces 6 · matched by industry

D3E–	Citric acid by Aspergillus niger fermentation instead of extraction from citrus fruit Replaces: Citric acid extracted from lemons, limes and other citrus (calcium citrate route, Italy and California before 1930)	FOOD
D1E–	Baking enzymes (fungal amylase, maltogenic amylase, xylanase, glucose oxidase, lipase) plus ascorbic acid instead of potassium bromate and azodicarbonamide as flour treatment agents Replaces: Potassium bromate (KBrO₃) and azodicarbonamide (ADA) used as oxidizing flour improvers/dough conditioners; part of chemical emulsifier use …	FOOD
D1E3	Fermentation and plant-derived sweeteners instead of aspartame, saccharin and sucralose Replaces: Artificial high-intensity sweeteners — aspartame (IARC 2B since 2023), saccharin, sucralose, acesulfame-K in beverages and dairy; part of …	FOOD
D3E–	Fermentation-produced chymosin instead of calf rennet in cheesemaking Replaces: Natural calf rennet (abomasum extract from veal calves); part of microbial/mold coagulants where bitterness was the problem	FOOD
D2E–	Enzymatic degumming (phospholipases) and enzymatic interesterification (immobilized lipases) of edible oils instead of acid–caustic chemical degumming and sodium-methoxide chemical interesterification Replaces: Phosphoric/citric acid plus caustic soda degumming and neutralization (soapstock, wastewater, oil losses); chemical interesterification with …	FOOD
D3E–	Enzymatic high-fructose syrup from starch instead of sucrose and acid hydrolysis Replaces: Cane and beet sucrose in beverages and processed foods; acid hydrolysis of starch for glucose syrup	FOOD

3 · How to implement 6 steps

1
Grain preparationFormulation & blending
Whole rice, barley or soybean is washed, soaked and steamed to gelatinise the starches, producing the accessible substrate that Aspergillus oryzae can colonise — the input step shared by every koji-derived product from South River Miso’s craft miso to Clearspring’s organic range.
Who can do this step matched automatically
Advanced Enzyme Technologies (NSE) India
✓ FSSC 22000 ✓ ISO 22000 500 m3
“This is a satellite blending, mixing and formulation facility, located at Vashind near Shahapur and dedicated to the company’s Animal Nutrition business.”
India Glycols (NSE) India
✓ FSSC 22000 ✓ ISO 22000 7,500 MT/ industrial scale
“Recent expansions and new facilities across процесses: MEG production growth (up to 200,000 MTPA), EO purification, ethoxylate, sulphation, formulation plants, and …”
Thai Wah Thailand
10,000 tons
“Premix Factory in Jiaxing, China, to develop and produce premixes for bakery, dim sum, coatings, and texturizers, with 10,000 tons annual capacity, signaling a shift toward …”
Silvateam Italy
✓ BRCGS ✓ FSSC 22000 ✓ ISO 22000 15,000 tons per year industrial scale
“Production of feed additives and premixtures”
2
Koji inoculationFermentation & cultivation
The steamed grain is cooled and inoculated with tane-koji (the Aspergillus oryzae spore starter from a specialist supplier), establishing the fungal culture that will perform the solid-state fermentation.
Who can do this step matched automatically
Advanced Enzyme Technologies (NSE) India
✓ FSSC 22000 ✓ ISO 22000 500 m3
“Technology: microbial fermentation with ~500 m3 fermentation capacity; 15+ patents; developed/upscaled probiotic production technologies.”
CHITOSE Japan
industrial scale
“AI x BIOMANUFACTURING”
Daesang South Korea
“[Daesang Targets Global Pharmaceutical Amino Acid Market, Building on 70 Years of Fermentation Technology — 2026-09-09”
3
Solid-state fermentationFermentation & cultivation
The inoculated substrate is incubated 40–50 hours in wooden vats or trays at 30–35 C with controlled humidity and aeration, during which the fungus secretes the amylases and proteases that convert grain starch and protein into the sugars and amino acids underlying miso’s characteristic umami.
Who can do this step matched automatically
Advanced Enzyme Technologies (NSE) India
✓ FSSC 22000 ✓ ISO 22000 500 m3
“Technology: microbial fermentation with ~500 m3 fermentation capacity; 15+ patents; developed/upscaled probiotic production technologies.”
CHITOSE Japan
industrial scale
“AI x BIOMANUFACTURING”
Daesang South Korea
“[Daesang Targets Global Pharmaceutical Amino Acid Market, Building on 70 Years of Fermentation Technology — 2026-09-09”
4
Maturation & packagingPackaging & fill-finish
The finished koji is blended with salt and soybean (for miso), salt and water (for shio-koji), or water (for amazake), then aged — miso in wooden vats for weeks to years at South River Miso — and finally jarred or bottled for retail.
Who can do this step matched automatically
India Glycols (NSE) India
✓ FSSC 22000 ✓ ISO 22000 7,500 MT/ industrial scale
“Key partners/customers mentioned: Bacardi bottling tie-up; JV with Clariant; tech partnerships with Wittemann, Hitachi, Air Liquide and Praxair; global/brand partnerships …”
Pakka (ex-Yash Pakka) India
1940 MT per annum industrial scale
“Pakka Limited (located in Ayodhya, India) provides regenerative packaging solutions for food products.”
RWDC Industries Singapore
industrial scale
“2026-04-02 [A Major Step Forward in the Fight Against Microplastics — RWDC Industries is positioning itself as a leader in sustainable biopolymers, specifically Solon PHA, a fully …”
Alterpacks Singapore
“[Alterpacks - New Materials Solutions — AlterPacks is a Singapore-based startup that develops sustainable packaging materials sourced from agricultural by-products.”
5
FormulationFormulation & blending
For assembled flavor-starter kits (Omsom), the koji-derived sauces and seasonings are combined with cuisine-specific recipe components into portioned consumer kits, extending koji umami into multi-cuisine home cooking.
Who can do this step matched automatically
Advanced Enzyme Technologies (NSE) India
✓ FSSC 22000 ✓ ISO 22000 500 m3
“This is a satellite blending, mixing and formulation facility, located at Vashind near Shahapur and dedicated to the company’s Animal Nutrition business.”
India Glycols (NSE) India
✓ FSSC 22000 ✓ ISO 22000 7,500 MT/ industrial scale
“Recent expansions and new facilities across процесses: MEG production growth (up to 200,000 MTPA), EO purification, ethoxylate, sulphation, formulation plants, and …”
Thai Wah Thailand
10,000 tons
“Premix Factory in Jiaxing, China, to develop and produce premixes for bakery, dim sum, coatings, and texturizers, with 10,000 tons annual capacity, signaling a shift toward …”
Silvateam Italy
✓ BRCGS ✓ FSSC 22000 ✓ ISO 22000 15,000 tons per year industrial scale
“Production of feed additives and premixtures”
6
Retail distributionDistribution & market access
Finished consumer packs — bottled shio-koji (Umami Cartel), jarred miso (Clearspring, Toiro, South River Miso), or assembled kits (Omsom) — are distributed through specialty and natural-food retail plus direct-to-consumer e-commerce, the consumer endpoint of the koji flavor-starter category.
Who can do this step matched automatically
Kikkoman Japan
1t
“Kikkoman Corporation is a Japan-based holding company focused on soy sauce and related foods, plus beverages and chemicals/biochemical, and an overseas wholesale business of Asian …”
Shinsegae Food South Korea
industrial scale
“MK — Shinsegae Food signed an MOU with TMG Holdings (La Conviet’s domestic importer) to source premium raw materials and jointly develop bakery products, focusing on croissants and …”
SDS Biotech (Kumiai group) Japan
“as the exclusive distributor for its functional feeds, including the greenhouse gas-reducing additive Rumminap.”

4 · Who delivers

Matched suppliers (matched automatically)

Fermenstation

Japan

Producer

active

In the services and supply catalogue 1 · paid service

Contract manufacturing (CMO/CDMO/toll)

Leading companies and institutes (from the brief)

Company / Institute	Country	Key products / platforms	Tech features	Status 2026
Clearspring	🇬🇧 United Kingdom	Organic Japanese white & barley miso	EU organic miso retail range; founded 1993	commercial
Omsom	🇺🇸 USA	Asian flavor starter kits	Sauce-and-seasoning kits; DayDayCook-acquired; founded 2020	commercial
Toiro	🇺🇸 USA	Premium Japanese miso import	Saikyo Miso Takumi, Shojin Shirodashi; founded 2018	commercial
Umami Cartel	🇺🇸 USA	Shio-koji sauce	Bottled shio-koji umami seasoning; founded 2019	commercial
South River Miso	🇺🇸 USA	Craft handmade koji miso	Wooden-vat traditional miso; founded 1982	commercial

5 · Rules & route to market

Route into Russia / EAEU: FOOD · Rospotrebnadzor / EAEU
declaration of conformity, or SGR within 30 calendar days for new/specialized ingredients (plus tests)
Information, not legal advice — confirm the procedure for your product. (2026-10-06)

United States

The US anchors the consumer koji category through craft miso production (South River Miso), Asian flavor-starter kits (Omsom), premium Japanese miso import (Toiro) and shio-koji seasoning (Umami Cartel), under FDA’s fermented-foods and FSMA framework.

South River Miso, Omsom, Toiro, Umami Cartel#

South River Miso Company (Conway, Massachusetts; founded 1982): the long-standing US craft producer of traditional handmade koji miso, aged in wooden vats — the reference American producer for the artisanal miso slice.
Omsom (founded 2020): Asian sauce-and-seasoning starter kits for regional cuisines; acquired by DayDayCook, extending koji-based umami into multi-cuisine home cooking and bundling with recipe platforms.
Toiro (founded 2018): curated single-origin Japanese miso (Saikyo Miso Takumi, Shojin Shirodashi) for the US premium market — the import-led premium miso channel.
Umami Cartel (founded 2019): bottled shio-koji sauce for the US umami-seasoning retail segment, riding Hanamaruki’s 2026 global liquid shio-koji momentum.

European Union

The EU anchors the organic-Japanese-miso retail segment through Clearspring, under the EU nutrition-claim framework and traditional-food and novel-food review pathways for fermented products.

Clearspring organic miso, EU nutrition-claim framework#

Clearspring (London, United Kingdom; founded 1993): the established EU organic-Japanese-foods brand, distributing organic white miso, barley miso and unpasteurised miso pastes across European natural-food retail — the premium koji miso channel for the EU market.
EU nutrition-claim framework: miso and shio-koji products carrying umami or probiotic-style claims fall under Reg (EC) 1924/2006; unpasteurised fermented products face additional hygiene and novel-food review where enzyme-active cultures are live.
Starter culture supply: European home-fermentation enthusiasts source Aspergillus oryzae tane-koji starter from specialist suppliers (e.g. startercultures.eu), underpinning the craft koji segment parallel to branded retail.

China

China is the historical origin of koji (麴, qu) for baijiu, soy sauce and fermented bean paste production, but the consumer flavor-starter-kit category as defined here has no confirmed Chinese commercial originator in 2026 sourcing. Chinese qu is an industrial fermentation-starter input for baijiu distilleries and soy-sauce fermenters rather than a finished retail consumer product, so the Chinese koji heritage sits upstream of this article’s consumer-packaged slice.

industrial qu heritage, no consumer starter SKU#

Industrial qu incumbent landscape: Chinese baijiang and soy-sauce producers use solid-state qu starters as an industrial input, distinct from the finished consumer flavor-starter kit format covered here.
No confirmed consumer SKU: no Chinese commercial originator of a retail koji/shio-koji/miso consumer flavor-starter product cleared source confirmation in 2026 sourcing.
Regulatory pathway: a Chinese consumer fermented starter would clear GB 2712 / GB 2760 (food-additive) review plus MARA’s fermented-foods framework, the same regime governing conventional fermented condiments.

6 · Money: tenders & grants

Grant	Enhancing ecodesign and circularity of consumer electronics European Commission · EU	Sep 22, 2027 341 days
Grant	Enhancing the competitiveness of organic crop breeding: focus on intercropping adapted varieties European Commission · EU	Sep 22, 2027 341 days

7 · Tech stack & innovations

The stack is built on solid-state fungal fermentation and craft maturation, rather than submerged-tank precision fermentation.

Solid-state koji fermentation (Aspergillus oryzae Cultivation):
- The 40–50 hour solid-state incubation of Aspergillus oryzae on steamed rice or barley produces enzyme-active koji rich in amylases and proteases that convert starch and protein into the sugars and amino acids underlying miso’s umami.
- South River Miso’s traditional wooden-vat process and Japanese craft producers maintain a richer microbial ecology than stainless-steel tray bioreactors, the source of craft miso’s differentiated flavour.
Shio-koji liquid formulation (Shio-Koji Bottling):
- Blending finished koji with salt and water, then fermenting into a pourable liquid seasoning, creates the shio-koji format whose 2026 Hanamaruki global relaunch and Umami Cartel retail bottling brought the category to Western consumers.
- Lightly pasteurised or raw bottling preserves the enzyme activity that makes shio-koji a functional meat tenderiser and marinade, not just a salt substitute.
Flavor-starter kit assembly (Omsom Kit Assembly):
- Omsom’s assembly of koji-based sauces and seasonings into cuisine-specific kits (with recipe cards and portioned components) extends koji umami into multi-cuisine home cooking, the format acquired and scaled by DayDayCook.

Sources 5 · 0 independent · 5 producer sites

Producers' own sites 5

Omsom producer checked 2026-04-06 · link not kept
Toiro producer checked 2026-07-22 · link not kept
Clearspring producer checked 2026-02-13 · link not kept
Umami cartel producer checked 2026-06-06 · link not kept
South river miso producer checked 2026-04-28 · link not kept