Natto is a Japanese delicacy that is growing in popularity because of its recently discovered heath benefits. Natto is made through the fermentation of soybeans with Bacillus Subtilis Natto (soybean spores). Natto starter spores are the key culture starter and when combined with soybeans, results in authentic, fresh Japanese natto. This 5g container of starter spores results in 30kg of fresh natto. Japanese instructions are included in the box with English instructions listed as one of the product pictures.