# South River Miso

the long-standing US craft producer of traditional handmade koji miso, aged in wooden vats — the reference American producer for the artisanal miso slice.

Source: https://en.bioecon.ru/companies/south-river-miso/
Updated: 2026-07-27

- Country: United States

## Verifiable facts

| Fact | Value | Source |
| --- | --- | --- |
| Funding | Federal grant of $46,403 in 2012 for solar electricity project | https://subsidytracker.goodjobsfirst.org/subsidy-tracker/us-south-river-miso-company-llc |
| Capacity | Over 40 tons of miso annually | https://brattleborofoodcoop.coop/news/south-river-miso/, https://valleyadvocate.com/2016/04/12/highly-cultured/, https://www.southrivermiso.com/about/our-story/ |
| Certification | USDA Organic certification | https://www.southrivermiso.com/more-to-explore/organic-certification/, https://www.southrivermiso.com/wp-content/uploads/2026/02/South-River-Miso-Company-Inc-7-28-25.pdf |
| Regulatory approval | Compliant with USDA organic regulations (7 CFR Part 205) and US-Canada Organic Equivalency Arrangement | https://www.southrivermiso.com/wp-content/uploads/2026/02/South-River-Miso-Company-Inc-7-28-25.pdf |
| Production site | 888 Shelburne Falls Rd, Conway, MA 01341, United States | https://www.southrivermiso.com/, https://www.southrivermiso.com/about/our-story/, https://www.southrivermiso.com/wp-content/uploads/2026/02/South-River-Miso-Company-Inc-7-28-25.pdf |
| Headcount | 10 employees | https://brattleborofoodcoop.coop/news/south-river-miso/, https://valleyadvocate.com/2016/04/12/highly-cultured/, https://www.southrivermiso.com/about/our-story/ |
| Revenue | Estimated annual revenue of $18 million in 2025 [medium confidence] | https://dataintelo.com/report/global-miso-paste-market |

Independent sources: brattleborofoodcoop.coop, dataintelo.com, subsidytracker.goodjobsfirst.org, valleyadvocate.com

## Technologies

- [Koji & fermented flavor-starter kits (consumer)](https://en.bioecon.ru/technology/koji-fermented-flavor-starters-consumer/)