The Best Way to Store Natto for Longevity and Freshness

Natto is a traditional Japanese food made from fermented soybeans. It is known for its pungent smell and slimy texture, but it is also packed with nutrients that are beneficial to one’s health. If you are a fan of natto or want to try it out, it’s essential to know how to store it properly.

Why Proper Storage Matters

Storing natto correctly ensures that the quality and taste of the product remain intact over time. Improper storage can result in spoilage or contamination, which may lead to adverse effects on your health.

Temperature Control

The temperature at which natto is stored plays a significant role in its preservation. The ideal temperature for storing natto ranges between 0-4°C (32-39°F). This range helps slow down bacterial growth and fermentation processes in the product. Therefore, make sure you keep your natto refrigerated at all times.

It is worth noting that exposing the product to temperatures above 10°C (50°F) will cause rapid bacterial growth leading to spoilage within hours. Also, freezing affects both the texture and flavor of the product; therefore, avoid doing so if possible.


Ventilation refers to allowing air circulation around stored items by opening windows or using ventilation fans. When storing natto, ensure proper ventilation as this prevents moisture buildup inside containers resulting in mold development.

You can achieve this by keeping your fridge organized such that air circulates freely through open spaces between containers while avoiding overcrowding them as this leads to condensation build-up inside packaging materials leading to spoilage.

Packaging Material Considerations

Packaging material matters when storing any food item; thus should be considered when handling Nattos too.. Food-grade plastic bags are suitable for short-term storage periods, but for long-term storage, consider using glass containers. Glass containers prevent the absorption of odors and flavors that may affect the taste of your natto.

Ensure to seal all packaging materials tightly to keep air out and maintain optimal moisture levels inside them.


Storing natto is essential in maintaining its quality and preserving its nutritional value over time. Proper temperature control, ventilation considerations, and appropriate packaging material are critical factors to remember when storing Nattos. With these steps in mind, you can enjoy delicious and healthy Nattos whenever you want without worrying about spoilage or contamination.

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