Premium Organic Umami Rice Koji (250g)
Premium Organic Umami Rice Koji (250g)
Organic Rice Koji for Miso, Shio Koji, Fermented Hot Sauce, and Your Best Ferments Yet.Â
This premium rice koji is made using heirloom spores - prized for their enzymatic strength and superior umami flavor - from Higuchi Matsunosuke Shoten in Osaka, Japan, and carefully cultivated on certified organic rice from southern California.
All koji is made by hand at Virginia’s first and only sake brewery - North American Sake - in Charlottesville, VA.
Obsessively Made for Obsessive Makers
We designed this rice koji specifically for professional chefs, fermentation fanatics and casual cooks to:
- Ferment one-of-a-kind misos
- Transform meals with fresh shio koji
- Supercharge sauerkrauts and fermented hot sauces
- Get funky with homemade garums
Elevate Your Everyday Cooking
Skip the fermentation and use this koji to immediately:
- Maximize your favorite marinades and dry rubs
- Tenderize, age, and amplify your proteins
- Add depth to dressings, soups, and sauces
We believe that well-made koji isn’t just an ingredient. It’s a tool for flavor innovation and a portal to both the deep past and culinary future. Trusted by fermentation wizards, home cooks, and Michelin-star chefs alike, koji is the backbone of Japanese fermentation—and this one’s made to be yours.
Ingredients: Aspergillus oryzae: BF-1 koji kin (Osaka, Japan), Organic medium grain Calrose rice (California, US)
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- 100% Plant-Based
- 100% Handmade
- 100% Gluten Free

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Koji FAQs
Is this koji dry?
Yes! All koji is dried to order after growing to maximize freshness, potency, and shelf life.
What can I make with my koji?
Umami koji for umami stuff, and sweet koji for sweet stuff. Easy peasy. For recipe inspo, click here.
It also makes a great gift for that experimental home cook in your life ;)
How long will my koji last on the shelf?
Because all koji is grown and dried fresh, shelf life is up to a year when stored properly. Just check the "USE BY" date on the back of the bag!
How should I store my koji?
All our koji should be stored in a cool, dry place - same as your other pantry staples. No freezing or refrigeration is necessary.
Is it Kosher?
Yes! Our production facility is Kosher certified.
Have a special request?
Buying for your retail space, restaurant or next workshop?
We have special rates just for you.