Premium Organic Umami Rice Koji (250g)
Premium Organic Umami Rice Koji (250g)
Best for Making Miso, Shio Koji, Fermented Hot Sauces, Marinades and Your Greatest Savory Ferments Yet.
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What is Koji Klub?
What is Koji Klub?
Koji Klub is for dedicated fermenters. Members will:
- Get up to 50% off all koji
- Ferment risk free with Project Protection
- Skip deliveries or cancel anytime.
Up to 50% OFF your monthly koji deliveries instantly, plus you'll get automatic Project Protection. That means if a fermentation project goes sideways, just send us an email and we'll replace your koji for free - just pay shipping!
Schedule a new koji delivery for every 2 weeks, every month, or every 2 months. Deliveries can be skipped based on need, or cancelled anytime for any reason.
For more info, click here.
Happy fermenting!
Craft more complex dishes, explore new fermentation techniques, and build better flavors with an organic rice koji made for serious makers. We cultivate prized Aspergillus oryzae spores from Higuchi Matsunosuke Shoten - renowned for exceptional enzymatic strength - on certified organic California rice. Every batch is made by hand at North American Sake, Virginia’s first sake brewery, ensuring precision, freshness, and performance you can taste.
Whether you’re fermenting a classic miso, garum, or simply upgrading weeknight marinades, this koji works as a powerful tool for flavor innovation. Rooted in Japanese tradition and refined for modern kitchens, it’s designed to make bold results feel effortless.
• Deep, natural umami and complex flavor
• Faster, more reliable fermentation
• Tenderizes and amplifies proteins
• Elevates marinades, sauces, soups, and other lactoferments

Ferment Your Best Ideas
Organic, purpose-built koji that gives you the versatility and reliability to start your most satisfying projects, recipes, or wild experiments.
Elevate Your Menu
Instantly enhance your menu and keep guests coming back for more. Our premium koji delivers the quality and consistency to compliment your best dishes and ideas.
Share New Flavors
Break the mold and discover flavors beyond the mainstream. Explore traditional Japanese fermentation, or apply your own flare to make what the world is waiting for.
Handcrafted with consistency you can count on.
See what other satisfied makers are saying:
Koji FAQs
Is this dry koji?
Yes! All our koji is slowly dried to order to maximize freshness, potency, and shelf life.
What can I make with my koji?
This koji is best for miso, shio koji, marinades, dry rubs, and all things savory. For quick tips and recipe inspo, click here.
Have an experimental cook in your life? It also makes a great gift!
What is the shelf life?
Because our koji is grown and dried fresh, shelf life is up to a year when stored in a cool, dry place. 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.
What about allergens?
None! Our koji is 100%:
- soy free
- gluten free
- nut free
- vegan
Have a special request?
Buying for your retail space, restaurant or next workshop?
We have special rates just for you.