Koji is a type of fungus (Aspergillus oryzae) used in eastern Asia for fermenting foods. It’s the primary ingredient behind many popular Japanese items like soy sauce, miso, and sake.

Is Koji vegetarian or vegan?

Yes, Koji is plant-based and suitable for both vegetarian and vegan diets.

What does Koji taste like?

It brings a sweet, rich, and umami flavor that enhances the original taste of foods.

Yes, Koji itself is gluten-free, but always confirm as it can be used in products that do contain gluten.

Can Koji be used in bread baking?

Yes, Koji can be used to naturally leaven bread, contributing to its texture, flavor, and shelf life.

How is it traditionally made?

Koji is traditionally made by inoculating steamed grains, usually rice, with the Aspergillus oryzae spores.

Is it safe to eat Koji?

Yes, Koji is safe to eat. It has been used for centuries in Asian cuisines.

How can you store Koji?

It can be stored in a cool, dark place like a pantry or the refrigerator, making sure it’s well sealed to avoid moisture.

Can I make Koji at home?

Yes, with the right environment and materials, you can make Koji at home.

What are some common dishes that use Koji?

It is used in making miso, Sake, rice vinegar, soy sauce and to ferment meats, fish and vegetables.

Are there health benefits associated with Koji?

Koji aids in digestion, provides a good source of protein, and is rich in vitamins and minerals

Is Koji the same as mold?

Koji is a type of beneficial fungus or mold, but not all molds are Koji.

What does Koji do to food?

Koji breaks down the proteins, carbohydrates and fats in food, enhancing the taste and making them easier to digest.

What is the relationship between Koji and Umami?

Koji helps produce a rich umami flavor in foods through the process of fermentation.

Is there a western equivalent to Koji?

Although there isn't a direct western equivalent, the concept of using yeast and bacteria in bread-making and cheese-making is similar.

Where can I buy Koji?

You can buy it at Weee! Asian Market, www.sayweee.com.

Buy koji online

Delve into the world of Koji, an indispensable facet of east Asian cuisine and culture. Koji, made from a type of rice that has been fermented with a specific strain of mold, is a unique ingredient that contributes a rich, umami flavor to a variety of dishes. Its cultural resonance extends across centuries, shaping culinary traditions in Japan, China, and Korea. This page offers a comprehensive exploration of Koji, covering its historical and cultural significance, the cooking equipment essential for creating Koji-infused dishes, step-by-step cooking guidelines, and an assortment of innovative Koji recipes. Additionally, you will find information on related products and recipes to assist you in embracing this versatile ingredient in your own kitchen.

Top 5 products for Koji

#1

Hikari Shio Koji (Japanese All Purpose Seasoning) 20.4 oz

A versatile addition to your pantry, Hikari Shio Koji is an all-purpose seasoning, making it the perfect match for a query on Koji. It's a critical ingredient in numerous Asian dishes, imparting a sweet, savory umami flavor to marinades and sauces. This Koji seasoning enhances the taste of sushi, sashimi, grilled fish, and pickles. As a natural tenderizer, Hikari Shio Koji also healthily replaces salt, maintaining the nutrients and improving digestion. This is your key to authentic Japanese cuisine.

$8.99 - $10.99

Shop now

I love using this to tenderize & flavor meat before cooking. Just marinate while getting your other ingredients ready. Also lessens the meaty smell, if any. This is a great product & I have been using it for years. Now I can conveniently buy from Weee! instead of making a trip to my local Japanese market.
Yuko
I have always wanted to try this salt-baked dish. I happened to see it on Weee and immediately bought it to try.
Sharon W
I'm so happy that I can buy the much talked about Shio Koji in America! I'm looking forward to trying it because it supposedly tenderizes meat.
tokyomama
This is my first purchase. It's useful for seasoning meat and fish.
momo
I always had shio koji on hand when I was in Japan, so I was very happy to be able to buy it here after a long time I immediately made shio koji marinated chicken and it was very easy and delicious I'm looking forward to marinating pork next time
weee.14237242
Good amount. Excited to try it out!
Emily
Perfect for beef!
malou3279
I love this stuff! It makes chicken taste so tender!
weee.7260908
Suitable for marinating meat, which can make the meat soft and tender.
ya711010usa
After 24 hours of marinating, the meat is still tender after grilling. If I want to know the steps, you can go to my profile photo and search for this ingredient to learn more.
Tiffany 蕭

#2

Cold Mountain Rice Koji 1 case

This Koji, a cornerstone of many Asian dishes like miso and sake, can elevate your culinary creations. Ideally used in fermentation, it imparts a unique, umami-rich flavor. Buying in bulk (1 case) is economical and ensures you have enough for various recipes. If it's frozen, it simplifies storage and extends shelf life. Additionally, Koji is a good source of enzymes, contributing to a healthy diet.

$10.99

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This is my first time buying rice koji. I want to try making sugar-free red bean paste and salt koji. If it works and tastes good, I will put it on my regular list.
Alisia
The delivery was in good condition and arrived refrigerated. Peace of mind.
Gomashio
I bought this hoping to use it to make Kinzanji miso. I hope it works...
Sari
It was out of stock for a long time, but now it is finally available. This locally made rice koji is of very good quality.
Irene
I bought it for the first time
Ichie
It's cheaper than buying it at a Japanese supermarket, and it's great to have it delivered to your home.
Irene
I wanted rice koji, so I wonder if it's being re-released? I'm glad I was able to buy it.
Miya8989

#3

IseSo Miyako Handmade Rice Koji 1kgBB4/31/26

Premium rice koji offers active enzymes that sweeten and tenderize dishes. Ideal for miso, sake, shochu, and sushi rice fermentation, it adds umami depth and a mild, nutty aroma. Rich in probiotics and low‑calorie, it supports digestion and gut health.

$19.99

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I made miso this month too I'm grateful that the recipe for miso is displayed I bought two bags, so I'm thinking of making shio koji or soy sauce koji too.
kaorumase
I always use this koji to make homemade miso and other koji seasonings. Even though it is dried koji, it is very soft and easy to use!
gmidori214
I always bought it from a certain major website, but I'm happy to be able to buy it cheaply here! At home, we make our own salt koji, soy sauce koji, miso, etc., and Miyako Koji is an essential item, so it's very helpful
aonigirii
I prepared Shio Koji!
May

#4

Marukome Hana Koji Miso 650 g

This koji is a crucial ingredient in Asian dishes like miso soup, marinades, and pickled vegetables. Marukome Hana Koji Miso boasts a robust, savory flavor, enhancing the depth of your meals. Koji holds health benefits, including aiding digestion and boosting immunity. Its 650g size offers great value, ensuring you have enough for various delectable recipes.

$5.79 - $8.49

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First time try this. Gotta make soup base
PL
I bought it because the reviews were good
Naaaan
I ran out of homemade miso, so I bought some store-bought miso for the first time in 10 years. I hope it tastes good.
weee.13192963
My favorite miso! I'm buying it again.
Onakasuita
I bought it because it was on sale and had good reviews!
weee.15177292
It's so cool that I can buy the koji miso I use in Japan in America too It's a bit more expensive than in Japan, but buying miso in America can be expensive, so this makes it more affordable!
weee.8606291
I haven't tried it yet, but I bought it because it was on sale.
Ari
I’ve always ordered the miso paste with dashi. But I just recently read about using the miso paste without dashi for ramen. So I’m trying this one!
kamvinluan

#5

Miko Brand Mutenka Koji Miso Paste 26.5 oz

This Miso Paste is an excellent choice for individuals interested in Koji, a crucial ingredient in Asian cuisine. Crafted by Miko Brand, it boasts a rich, umami flavor ideal for soups, marinades, and sauces. Prepared with Mutenka Koji, it's integral to authentic Japanese dishes such as Miso Soup and Ramen. Given its healthy reputation, it delivers probiotics and aids digestion. Its convenient packaging ensures freshness and easy storage, making it a handy pantry staple for your Asian culinary creations.

$7.99 - $10.29

Shop now

Always saves me from my cravings!
monteskateceleste
Good ~<<<<<<
Sohyen
Clean ingredients
weee.13446609
I bought it for the first time after reading the reviews.
Myya
This was my first purchase on sale. It was big and a great deal.
always30way
Second time buying, good flavor
TV
I got it cheap on sale.
KonomiShibata
I haven't eaten it yet. I bought it for the first time. I heard it tastes sweeter.
weee.7541327
Personally, I thought it was neither good nor bad, just an average miso in a good way.
kinako
It's okay, it's edible.
weee.13019858

Popular recipes

Instant Pot Koji Chicken

Deliciously tender, this recipe uses to bring out the subtle flavors of chicken in the Instant Pot. Packed with protein, it's a healthy and satisfying main dish. You will need chicken thighs, , soy sauce, garlic and scallions.

Koji Stir-Fry Vegetables

A quick, easy and delicious recipe to level up your stir-fry. Using in this recipe creates a unique deep flavor in your favorite vegetables. The essentials for this recipe are mixed vegetables, , sesame oil, garlic and soy sauce.

Koji Miso Soup

A twist on a classic, this Koji Miso Soup is simple, hearty and full of good-for-you ingredients. Adding to the traditional recipe brings the dish to a whole new level. This recipe requires water, , miso paste, tofu and green onions.

Rice Cooker Koji Rice

Let the rice cooker do all the work in this simple, satisfying dish that showcases the unique flavor of . Trust us, it takes plain rice to a whole new level. All you need is rice, , water, salt and sesame oil.

Koji Marinated Tofu

A simple, but flavor packed dish where tofu gets a big upgrade from . Super easy to prepare and results in a delicious and complex-flavored tofu. You'll need tofu, , soy sauce, garlic and green onions.

Koji near me

Buy your favorite koji online with free delivery. Weee! has nation wide free shipping options with low minimums. Order koji near you and enjoy on-demand, contactless free delivery. Our asian market has no markups and prices are most often cheaper than retail stores. Thousands of families rely on Weee! to get fresh oriental cuisine food ingredients to their home for cooking dinner. Find the biggest nearby selection of Japanese, Korean, Vietnamese, Chinese, Filipino, or Indian food. Now accepting EBT/SNAP at checkout for most major cities in the USA.

We believe Asian groceries should be accessible and affordable for all

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Very good prices, delivery on times of any time I ordered . Good service. Good product. You can find anything's on Weee!

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Jun. 2024

I've hunted all over Connecticut for Asian groceries and they're difficult to find in my area. I love being able to order them on Weee!

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Apr. 2024

Great customer service. Experienced customer service who answers the phone could always solve problem efficiently.

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Jan. 2024

I really appreciate that you work hard to uphold standards of quality. I like the wide variety of products and the ease of shopping with you.

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Frequently asked questions

What is Koji?
Koji is a type of fungus (Aspergillus oryzae) used in eastern Asia for fermenting foods. It’s the primary ingredient behind many popular Japanese items like soy sauce, miso, and sake.
What does Koji taste like?
It brings a sweet, rich, and umami flavor that enhances the original taste of foods.
Can Koji be used in bread baking?
Yes, Koji can be used to naturally leaven bread, contributing to its texture, flavor, and shelf life.
Is it safe to eat Koji?
Yes, Koji is safe to eat. It has been used for centuries in Asian cuisines.
Can I make Koji at home?
Yes, with the right environment and materials, you can make Koji at home.
Are there health benefits associated with Koji?
Koji aids in digestion, provides a good source of protein, and is rich in vitamins and minerals
What does Koji do to food?
Koji breaks down the proteins, carbohydrates and fats in food, enhancing the taste and making them easier to digest.
Is there a western equivalent to Koji?
Although there isn't a direct western equivalent, the concept of using yeast and bacteria in bread-making and cheese-making is similar.

Is Koji vegetarian or vegan?
Yes, Koji is plant-based and suitable for both vegetarian and vegan diets.
Is Koji gluten-free?
Yes, Koji itself is gluten-free, but always confirm as it can be used in products that do contain gluten.
How is it traditionally made?
Koji is traditionally made by inoculating steamed grains, usually rice, with the Aspergillus oryzae spores.
How can you store Koji?
It can be stored in a cool, dark place like a pantry or the refrigerator, making sure it’s well sealed to avoid moisture.
What are some common dishes that use Koji?
It is used in making miso, Sake, rice vinegar, soy sauce and to ferment meats, fish and vegetables.
Is Koji the same as mold?
Koji is a type of beneficial fungus or mold, but not all molds are Koji.
What is the relationship between Koji and Umami?
Koji helps produce a rich umami flavor in foods through the process of fermentation.
Where can I buy Koji?
You can buy it at Weee! Asian Market, www.sayweee.com.

I love using this to tenderize & flavor meat before cooking. Just marinate while getting your other ingredients ready. Also lessens the meaty smell, if any. This is a great product & I have been using it for years. Now I can conveniently buy from Weee! instead of making a trip to my local Japanese market.
Yuko
I have always wanted to try this salt-baked dish. I happened to see it on Weee and immediately bought it to try.
Sharon W
I'm so happy that I can buy the much talked about Shio Koji in America! I'm looking forward to trying it because it supposedly tenderizes meat.
tokyomama
This is my first purchase. It's useful for seasoning meat and fish.
momo
I always had shio koji on hand when I was in Japan, so I was very happy to be able to buy it here after a long time I immediately made shio koji marinated chicken and it was very easy and delicious I'm looking forward to marinating pork next time
weee.14237242
Good amount. Excited to try it out!
Emily
Perfect for beef!
malou3279
I love this stuff! It makes chicken taste so tender!
weee.7260908
Suitable for marinating meat, which can make the meat soft and tender.
ya711010usa
After 24 hours of marinating, the meat is still tender after grilling. If I want to know the steps, you can go to my profile photo and search for this ingredient to learn more.
Tiffany 蕭
This is my first time buying rice koji. I want to try making sugar-free red bean paste and salt koji. If it works and tastes good, I will put it on my regular list.
Alisia
The delivery was in good condition and arrived refrigerated. Peace of mind.
Gomashio
I bought this hoping to use it to make Kinzanji miso. I hope it works...
Sari
It was out of stock for a long time, but now it is finally available. This locally made rice koji is of very good quality.
Irene
I bought it for the first time
Ichie
It's cheaper than buying it at a Japanese supermarket, and it's great to have it delivered to your home.
Irene
I wanted rice koji, so I wonder if it's being re-released? I'm glad I was able to buy it.
Miya8989
I made miso this month too I'm grateful that the recipe for miso is displayed I bought two bags, so I'm thinking of making shio koji or soy sauce koji too.
kaorumase
I always use this koji to make homemade miso and other koji seasonings. Even though it is dried koji, it is very soft and easy to use!
gmidori214
I always bought it from a certain major website, but I'm happy to be able to buy it cheaply here! At home, we make our own salt koji, soy sauce koji, miso, etc., and Miyako Koji is an essential item, so it's very helpful
aonigirii
First time try this. Gotta make soup base
PL
I bought it because the reviews were good
Naaaan
I ran out of homemade miso, so I bought some store-bought miso for the first time in 10 years. I hope it tastes good.
weee.13192963
My favorite miso! I'm buying it again.
Onakasuita
I bought it because it was on sale and had good reviews!
weee.15177292
It's so cool that I can buy the koji miso I use in Japan in America too It's a bit more expensive than in Japan, but buying miso in America can be expensive, so this makes it more affordable!
weee.8606291
I haven't tried it yet, but I bought it because it was on sale.
Ari
I’ve always ordered the miso paste with dashi. But I just recently read about using the miso paste without dashi for ramen. So I’m trying this one!
kamvinluan
Always saves me from my cravings!
monteskateceleste
Good ~<<<<<<
Sohyen
Very well packaged
hnthang9396
I love this miso paste, which I use to make miso soup. I also use it to marinate fish before grilling.
AileneEvans
I drink it when I get hungry in the middle of the night or mix it into my oatmeal and eat it!
ImeSP
It was just as delicious as regular miso. It contains dashi, so it's easy to use and very helpful.
Dhhdhfjdxo
Very delicate, very convenient to put tofu in soup.
琳
I had miso soup and it was delicious.
greatjenny.jung
I was able to buy it cheaply. The quantity is large, so it's useful since I make miso soup almost every day.
hhh
Can’t wait to try this thank you Weee!
Olivia
You can use it just like in Japan.
nana
Pretty decent sized box and about 15 percent cheaper than my local area supermarket
jgui