How long will this keep? Will freezing it help it longer?

I wouldn't freeze it because I wouldn't have it around that long.

After opening the package, can we keep it in the room temperature?

Mine has been open but I put it into a large Ziploc. It's fine at room temp as long as it's dry and not exposed to moisture.

Would this be considered white or yellow koiji?

Miyako Kouji is produced using both white and yellow kouji.

How do I make more koji using this?

Koji original form is rice (shown in the bag) if you want to make more then grind into powder to achieve the flour base if your wanting to use it for drenching foods before cooking or to age your beef over a day or two. I don’t know if this answers your question

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IseSo Miyako Koji 1kg

Product ID: 24065522

Details

Brand
Isesou
Item Package Quantity
1
Item Weight
1.02 Kilograms
Number of Items
1
Unit Count
35.27 Ounce

🍚100% Domestic Rice Base

📦1kg Bulk Powder Pack

🕰️Long-Term Storage Stability

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₩83421

Duties & taxes included

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Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
Isesou
Item Package Quantity
1
Item Weight
1.02 Kilograms

Description

🍶 Unlock the secret ingredient to authentic Japanese flavor mastery!

PURE NATURAL INGREDIENTS - 100% domestic rice ensures clean, vegan-friendly fermentation.
VERSATILE CULINARY BOOSTER - Elevate miso, sake, and pickling with premium koji culture.
BULK SIZE FOR SERIOUS COOKS - 1kg pack designed for frequent use and recipe experimentation.
AUTHENTIC JAPANESE CRAFTSMANSHIP - Handmade koji powder crafted for true culinary tradition.
SHELF STABLE READY WHEN YOU ARE - Dry powder form guarantees long-lasting freshness and potency.

IseSo Miyako Koji 1kg is a premium, handmade koji powder made from 100% domestic rice, perfect for crafting authentic miso, sake, and pickled delicacies. Packaged in a convenient 1kg bulk size, this vegan-friendly ingredient offers long-term storage stability, empowering culinary professionals and enthusiasts to explore traditional Japanese fermentation with ease and confidence.

Specifications

ASIN	B004FHB5OO
Best Sellers Rank	#23,808 in Grocery & Gourmet Food ( See Top 100 in Grocery & Gourmet Food ) #16 in Winemaking Ingredients
Brand	Isesou
Brand Name	Isesou
Coin Variety 1	Rice
Container Type	Bag
Cuisine	Japanese
Customer Reviews	4.7 out of 5 stars 2,567 Reviews
Item Form	Powder
Item Package Quantity	1
Item Package Weight	1.02 Kilograms
Item Type Name	food
Item Weight	1.02 Kilograms
Manufacturer	Iseso Co., Ltd.
Number of Items	1
Part Number	25080
Set Name	Rice
Size	2.2 Pound (Pack of 1)
Specialty	Vegan
Unit Count	35.27 Ounce

Reviews

K**M

3.12.2025

K**N

23.02.2026

R**V

16.10.2025

K**R

12.04.2024

J**M

22.07.2025

Y**Y

24.01.2021

S**R

10.01.2026

M**R

7.07.2025

S**U

23.02.2026

M**A

14.03.2025

C**O

25.03.2025

F**A

4.12.2025

ぷ**ー

9.03.2026

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