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: 716731279

Details

Brand
Isesou
Item package quantity
1
Item weight
1.02 Kilograms
Number of Items
1
Unit count
1000.00 Grams

🌾100% domestic rice

📏compact 220x40x300 mm size

⚖️1 kg premium weight

$145.83

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Description

🌾 Unlock the secret to authentic Japanese flavor with every grain!

LONG LASTING POTENCY - Dry-processed for powerful fermentation that stays consistent even after long-term storage.
PURE DOMESTIC RICE BASE - Sourced entirely from premium domestic rice, ensuring superior flavor and purity.
VERSATILE CULINARY ESSENTIAL - Elevate your cooking with a foundational ingredient that enhances miso, sake, and pickling.
AUTHENTIC HANDMADE CRAFTSMANSHIP - Experience the rich tradition of artisanal koji, crafted by hand for unmatched quality.
PERFECTLY SIZED FOR YOUR KITCHEN - Compact dimensions fit seamlessly into any culinary space without clutter.

IseSo Miyako Koji 1kg is a premium, handmade koji crafted from 100% domestic rice. Its dry processing method ensures long-lasting fermentation power, making it an essential ingredient for miso, sweet wine, and pickling. Compactly sized for easy kitchen storage, this 1 kg pack delivers authentic Japanese culinary tradition straight to your home.

Specifications

ASIN	B004FHB5OO
ASIN	B004FHB5OO
Age Range Description	All Ages
Best Sellers Rank	#36,984 in Grocery ( See Top 100 in Grocery ) #13 in Active Dry Yeasts
Brand Name	Isesou
Coin Variety 1	Koji Rice Powder
Container Type	Bag
Customer Reviews	4.6 4.6 out of 5 stars (2,648)
Customer reviews	4.6 4.6 out of 5 stars (2,648)
Is Discontinued By Manufacturer	No
Item Form	Powder
Item Package Quantity	1
Item Package Weight	1.03 Kilograms
Item Type Name	food
Item Weight	1.02 Kilograms
Manufacturer	IseSo
Manufacturer	IseSo
Manufacturer reference	25080
Number of Items	1
Number of Pieces	1
Part Number	25080
Product Dimensions	4.39 x 28.5 x 21.01 cm; 1.02 kg
Serving Range	More than 15 servings
Set Name	Rice
Size	2.2 Pound (Pack of 1)
Specialty	No information
Unit Count	1000.00 Grams

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$145.83

Duties & taxes included

In stock

Sold byAmazon Northern Mariana IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Northern Mariana Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

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Received my product in pristine condition. Great service overall.

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