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Premium Organic Umami Rice Koji (250g)

Premium Organic Umami Rice Koji (250g)

The Best Koji for Miso, Shio Koji, Fermented Hot Sauces, and Your Greatest Savory Ferments Yet.

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!

  • Satisfaction Guarantee
  • Don't like it? Return it for free!
  • Free Shipping over $49

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

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Start Your Next Project

Organic, purpose-built koji that allows you to explore to the edge of your creativity and beyond.

Elevate Your Menu

Deliver the quality and consistency your guests are expecting by leveraging a koji that let's you instantly enhance the complexity and depth of your best dishes.

Explore the Cutting Edge

Break the mold and discover flavors beyond the mainstream. Adventure into traditional Japanese fermentation, or apply your own flare to make something truly your own.

What makers are saying:

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?

This koji is best for miso, shio koji, marinades, dry rubs, and all things savory. For quick tips and 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.

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.

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