I have been doing research on gluten free sake claims, and most of the time, it is true that sake does not contain gluten.
Some breweries have fruit extracts (pear, plum, raspberry, etc) added to a few of their sakes, however, and whether these extracts are GF or not is unknown.
In addition, in Japan 70% of the sake is futsu-shu or “table sake” and this sake can have malt syrup added to it, as it is the lowest grade of sake and the syrup, as well as other additives, help out with the taste. So, it’s better to look for junmai or honjozo-style sakes for they are always gluten free 100% of the time.
Futsu-shu style sakes do not by rule contain gluten, but they might. In the USA, very few futsu-shu style sakes are imported. Of the 1000 or so sakes coming into the USA, this number might be less than 20?
Just thought I would share!
Love your website.
Next week on Wednesday the Northern California premium sake fest will take place here in Sacramento. How exciting, especially after you added your premium sake section.
Give it a whirl!
Enjoy and Kanpai!