Natto is fermented soybeans. Natto has long been recognized as one of Japan’s most unique traditional health foods. Highly nutritious and rich in protein, it is often eaten with cooked rice. For centuries, natto has been made using a specialized fermentation process by adding beneficial bacteria, Bacillus natto to soybeans. Fermentation enhances the nutrition of soybeans and develops a unique flavor and texture. Its physical texture is sticky and is a natural result of the fermentation process.