Super Food From Japan What is Natto? Natto, a traditional Japanese soybean product, is made by fermenting steamed soybeans with Bacillus subtilis spores. Natto is a nutrient-packed, additive-free superfood from Japan, known for its distinctive aroma, flavor, and slimy texture. No artificial colors or preservatives are used. Source: "Natto Awareness Survey" Report of Survey Results, by National Federation of Natto Cooperative Associations. 2021.06 Commitment to Freeze-Dried Natto Beans No food additives, colorants, or preservatives. Perfect for vegans as it contains no animal derivatives. If eaten as is, like nuts, it is easy to eat even for people who don't like the smell of natto.