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Nattō (納豆) is a traditional Japanese food made from soybeans fermented with Bacillus subtilis var. natto. Some eat it as a breakfast food. It is served with soy sauce, karashi mustard and Japanese bunching onion. Nattō may be an acquired taste because of its powerful smell, strong flavor, and sticky, slimy texture. In Japan, nattō is most popular in the eastern regions, including Kantō, Tōhoku, and Hokkaido.
== History ==
Sources differ about the earliest origin of nattō. One theory is that nattō was codeveloped in multiple locations in the distant past, since it is simple to make with ingredients...