Natto is made from soy beans that are fermented by the natto fungus. Before eating, natto should be stirred until you produce many like spider threads. Then a little bit of soy sauce is added. Some people like to put in chopped green onions, Japanese mustard and other condiments according to taste. Most commonly, natto is eaten with steamed rice.
Because of the strong smell and sticky appearance, non-Japanese often have trouble when trying natto for the first time. “Mito natto” made in Mito city, Ibaraki prefecture is very famous.