How to Make Salt Koji (Shio Koji)

Hello, welcome to Kawashimaya The Japan Store.

We have gathered the recipe of simpleSalt Koji (Shio Koji) that you can try at home.

Salt Koji (Shio Koji) is Japanese seasoning made from rice koji, salt, and rice.

We would really happy if you could use this recipe to make your own delicious Salt Koji.


Contents List


How to Make Salt Koji (Shio Koji)


  • - Malted rice (rice koji):100g
  • - Salt:40g
  • - Water(clean water or mineral water):200cc
  • - Honey container or glass container


There are 6 steps in total to make Salt Koji (Shio Koji)

  • 1. Put The Malted Rice
  • 2. Put The Salt
  • 3. Mix it well.
  • 4. Pour The Water
  • 5. Close The Lid and Shake it Well
  • 6. Ferment it for 5-7 days

Click here to see our Recommended Product for Salt Koji


Steps for Making Salt Koji (Shio Koji)

1.Put the malted rice

Put the malted rice

Put 100g of malted rice in the container.

2.Put the salt

Put the salt

Put 40g of salt in the container.

3.Mix it well

Mix it well

Shut the lid firmly and shake it until mixed well.

4.Pour the water

Pour the water

Pour 200cc water into the container. Leave the water at about 30-35 degrees so the salt can melt quickly.

5.Close the lid and shake it well

Mix it well

Shut the lid firmly and shake it until mixed well. During the fermentation, once a day, close the lid and shake it until the Koji mixed well.



Please do not completely close the lid during fermentation. Fermentation may cause the container to break. Ferment it by placing the container at room temperature for 5-7 days.

Try the Salt Koji (Shio Koji) by licking it.

Try to try the Koji by licking it.

The Salt Koji is ready to consume if you can taste moderate saltiness and umami flavour.

Once done, please store it in the refrigerator. It could be consumed up to one month.

Click here to see our Recommended Product for Salt Koji


Trick and Important Point

Trick and Important Point
  • - You can use Shio Koji as it is from a honey container.
  • - Shio Koji is clean because it does not touch spoons.
  • - Can be stored in a refrigerator as it is in a container.
  • - When mixing the containers, close both the inner lid and the outer cap.
  • - You can always enjoy delicious Shio Koji if you use two different containers for cooking and fermenting in rotation.
  • - It will be convenient if you write the expiration date with sticky note and stick it to the containers.
  • - As fermentation proceeds, it may generate gas, so please do not seal it tightly. (You can seal it tightly after storage in the refrigerator)


Recommended Product for Salt Koji (Shio Koji)

Handmade Shio Koji Set
Handmade Salt Koji Set (Dried Koji・Salt・
Honey Container Set) for 850gr of Salt Koji
Kawashimaya's special set for handmade salt koji. You can make a delicious salt koji at home easily for only 15 minutes. The salt koji will increase the taste of various materials such as vegetables, meat, fish and so on.
Country Origin: Japan
Product Page
Honey Container
【Ideal For Making Salt Koji】
Honey Container 1000ml
The hygienic container, very useful if you use it to make shio koji. You can use it for making salt koji - fermenting salt koji - and storing salt koji. Aside from that, this multi function container can be use to store other things after you use it to store salt koji.
Country Origin: Japan
Product Page
Convenient Seasoning Bottle 500ml
(Cellar Mate)
The Cellar Mate glass product from "SEISHO Co.,Ltd" since 1962. It is a simple sealed bottle made with glass. Since it can be stored in a sealed condition, it can keep the flavor for long time.
Country Origin: Japan
Product Page