Tetron Steamer Cloth For Steaming and  Making Koji 100 x 100cm - 100% Made In Japan

Tetron Steamer Cloth For Steaming and Making Koji 100 x 100cm - 100% Made In Japan


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What Is Tetron Steamer Cloth?

Tetron Steamer Cloth (a type of polyester) is the suitable cloth to help you get the best steaming result that made from high-quality material. Mostly preferred by Japanese professional koji makers to make the nicely steamed rice. Also suitable as bamboo steamer mat and sushi rice cooking net. This tetron cloth is manufactured by Kotobukikako-Seiki.

Tetron Cloth Preview

Compatible with Extra Large Bamboo Steamer Size

This Tetron Cloth is made in a size that matches the Extra Large Bamboo Steamer Size with a 11.8 inch (30 cm) diameter. You can wrap the food by using this Tetron Cloth to get the best steaming result. Tetron Cloth can also become an important cloth to use when making koji because it will help to steam the rice evenly and make no rice stick to the steamer!

Tetron Cloth with Bamboo Steamer


We are pleased to inform you that Tetron Cloth is now available on Amazon USA. Click the link to see the product!


Excellent For Steaming And Making Koji

Made from tetron yarn, this cloth is heat resistant and not prone to discoloration, preferred by Japanese professional koji makers to make nicely steamed rice and foods.

Tetron Cloth Preview

It is durable in high temperatures and helps to get the best steaming result. It’s made from high-quality material and it’s easy to use for steaming. Therefore, it is perfect for making koji.

The Rice Grains Won’t Stick To The Cloth

Regular Cloth vs Tetron Cloth

Regular Cloth VS Tetron Cloth

The best feature of this cloth is that it is difficult for rice to stick to. Since you don’t have to clean the sticky rice from the cloth, it would save so much time during the koji-making process.

Ideal For Adjusting Humidity of Steamed Rice

Tetron to Wrap and Cover the Rice

During the warming period of koji, wrap and cover the rice with a tetron cloth, then cover it again with a bleached cotton cloth (double wrapping) to adjust the humidity of koji. The inner tetron layer has almost no water absorption and the outer cotton layer moderately prevents condensation and doesn’t absorb too much moisture. This technique is excellent for humidity and temperature adjustment when propagating koji on steamed rice grains.

What Is Tetron?

What Is Tetron

Tetron is a brand name for polyester-based synthetic fibers. The raw materials are ethylene/xylene from petroleum and naphthalene from coal. The material is characterized by its elasticity and durability. Since it doesn't wrinkle easily and is resistant to friction and water, it is used for clothing and is widely used for industrial purposes such as hoses, fishing nets, and insulating tape as well.

Why You Should Use Tetron Cloth?

● Non-Stick

● Reusable and durable

● Heat Resistant

● Lightweight

● Quick-drying

● Hard to fade & stain

Tetron Cloth 100x100cm Size Details

Tetron 100x100 Details

Tetron Cloth Size Variations

Multi-Purpose Cloth: Also Great for Steaming & Cooking Other Food!

Dumplings & Steamed Buns
Dumplings & Steamed Buns

Not only for making koji, use this non-stick cloth for steaming your favorite dishes like dumplings, dim sum, steamed buns, and shumai. Suitable cloth for bamboo steamer and stainless steel steamer.

Make Sushi Rice
Make Sushi Rice

Use it as a napkin when cooking sushi rice in the rice cooker. Place the mat cloth in the rice cooker together with washed rice. After it is cooked, transfer the rice into rice warmer or hangiri.

Steamed Vegetables
Steamed Vegetables

Make healthy and easy steamed vegetables. Use it as a steamer mat to make other steamed dishes like chicken, meat, seafood, etc.

Important Cloth to Use When Making Koji

Polyester cloth is essential to use when steaming rice using Bamboo Steamer (Seiro) in the koji-making process. Steam the washed rice wrapped with Polyester cloth in a Bamboo Steamer for about 40 minutes. The cloth will help to steam the rice evenly and make no rice stick to the steamer. Furthermore, it is easy to clean. Definitely make it more efficient when making koji!

What is Koji and How to Make it?

What is Koji

Koji is steamed grains (can be rice, barley, or soybeans) that have been inoculated with koji-kin (Aspergillus oryzae). This ingredient is responsible for making Japanese fermented foods like miso, amazake, sake, soy sauce, mirin, shio koji, shoyu koji, pickles, etc.

To produce sucessful koji without fail, there are detailed steps that you have to fulfill in the progress. Kindly refer to our article below:

How to Make Rice Koji
How to Make Koji Rice Thumbnails
Koji is steamed grains which have koji starter mold grown on them. It is a treasure house of enzymes, and it decomposes grains into amino acids, vitamins, minerals and more. Making Rice Koji is not only fun and economical; you get to know exactly what ingredients are being used in the process. Follow our easy 11 steps and get Koji-making!

Other Tools That You Can Use Along With Tetron Cloth

To Make Steamed Dishes and Steaming Rice When Making Koji

With the many advantages of tetron cloth, you can make various dishes more easily, including koji, which needs to use cloth in making it. In its use, you can use the Tetron Cloth along with the Bamboo Steamer (Seiro), which is the right combination of tools to create your best dishes. Find our recommendation products below that will help you produce better food!

Yong Long Deep Bamboo Steamer (Tray+Lid Set) ExtraLarge 30cm

Yong Long Steamer

Yong Long (永龍) craftsmen have been making bamboo steamers for more than 10 years. They have carefully crafted this product one part after another by hand. It's perfect for serving side dishes for 1 to 3 people and won't take up too much space on the table.

Large: 30 cm

Click here to view product

To Make Rice Koji Properly

This tetron cloth is essential when steaming rice using Bamboo Steamer (Seiro) in the traditional koji-making process. It is even preferred by Japanese professional koji makers to make nicely steamed rice and foods. However, we also provide Koji Tray for you to be more comfortable in the koji-making process with this professional-style container so that you can produce the ideal koji at home.

Koji Tray (Morobuta/Kojibuta) Size L - Locally Made, 100% Natural Japanese Cedar Wood

Koji Tray (Morobuta/Kojibuta) Size L - Locally Made, 100% Natural Japanese Cedar Wood

Koji tray large size is a professional-style container that is ideal for making koji at home. Called kojibuta or morobuta in Japanese, the koji tray is the proper tool to make koji.

This product itself is limited in the market. Crafted with local natural Japanese cedarwood, this product is constructed by hand, one part after another by skillful craftsmen.

Measurement: 55cm x 33.5cm x Height 7cm

Click here to view product

We also provide other types of quality fabrics besides Tetron, which of course, can be essential in improving the quality of your cooking.

Polypropylene Cloth (Pairen) For Koji Making and Cooking 94 × 100cm

3pcs Set Bleached Cotton Cloth 40 x 90cm For M & L Size Koji Tray

Cotton Steamer Cloth For Steaming Dishes 2L size (100 x 100 cm)

Customer's Voice

Tetron steamed cloth is very good. Since the steamed rice doesn't stick to the steamed cloth, it saves a lot of time and effort. In addition, after steaming, you can quickly move to the cooling and moisture dissipation process, improving quality. I think it's worth the price. (Male, 60s)

I was able to steam it so well that no grains remained. I wonder why I didn't use it earler. I think it's a really good product without wasting any materials. (Female, 50s)

I bought two different sizes of Tetron, but I am happy that they are very easy to use. It don't take much effort to wash and dry immediately after use too. It is really a big deal. (Female, 40s)

Care Instruction

● Please hand-wash the cloth with dish soap and dry with sunlight after use.

● Please avoid washing it in a washing machine

Product Details
Size 100 x 100cm
Material Tetron
Country of Origin Japan
Tetron Cloth 100x100cm

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