The following is a list of the most frequently asked questions we have received.
If your question is not included in this list, please contact us.

What is the white film-like substance on the surface of natto?
The white film-like substance on the surface of natto is a cover of bacterial film, and is a sign that the natto is fermenting well. It is edible and completely non-toxic.
What is this white granular substance that appeared on the surface of natto?
As fermentation progresses, crystallized amino acid called tyrosine which looks like white granules might appear. This is not harmful, but it may cause a crunchy texture and a bitter taste, and the fermentation process may have progressed to the point where the original flavor is lost.
How do you store natto?
Natto should always be stored in the refrigerator. The natto spore will be active when the temperature rises above 10 degrees Celsius. Extended storage at room temperature may affect the quality of the natto.
For large containers, please use a clean spoon to scoop the natto, and cover the surface of the remaining natto with cling wrap to prevent it from drying out, so that the flavour is less likely to be lost.
Can I buy outside of Sydney and NSW?
Unfortunately we have not found a partner who can deliver refrigerated Natto outside of Sydney safely and reasonably. Therefore currently we are only able to provide our product to the Sydney area only.
If we can find a safe and reasonable transportation mode, we would like to provide it outside of Sydney.
If you know of any good transportation options, please let us know !
Is sauce included?
Sauce is not included, though Dai’s Natto recommends Shiro-dashi.
When is the Best Before date? What happens after the Best Before date?
The shelf life for Kotsubu Natto and Organic Natto are 12 days from production date for large containers and 14 days for small cups, and the shelf life for Hikiwari Natto (Only available with small cup) is 10 days from Production date.
No dramatic changes will occur immediately after the best before date, however tyrosine and ammonia smell may occur over time.
When is the best time to eat natto?
Natto ferments slowly in the refrigerator and the Umami flavor increases as the days go by. As a natto Otaku(geek), I recommend eating natto around the best before date, when the Umami flavor is enhanced, but some of our customers prefer natto when it is less fermented.
Please find your favorite fermentation stage among the ever-changing flavors.
Why do large containers and small cups have different best before dates?
This is because large containers are intended for continuous use. Since the quality of the product may be affected by temperature changes and dryness caused by taking the product in and out of the refrigerator, the shelf life is set slightly shorter than small cups, which are intended for single and disposable use.
Are genetically modified soybeans used ?
We do not use any genetically modified soybeans.
Is it safe to eat if I have a soy allergy?
Since soybeans is the main ingredient, it is not recommended for those who are allergic to soy to eat Natto.