Natto is a traditional Japanese food made from fermented soybeans. It has a distinctive sticky, stringy texture and a strong, pungent aroma and flavor. Natto originated in northeast Japan, where it has been consumed for centuries as a nutritious and affordable source of protein.
The production of natto involves steaming soybeans and then fermenting them with the Bacillus subtilis var. natto bacteria. This fermentation process breaks down the soybeans, resulting in the characteristic sticky, stringy texture. The fermentation also produces compounds that give natto its signature aroma and flavor, which has been described as nutty, earthy, and even slightly cheese-like.
In Japanese cuisine, natto is commonly served as a topping for rice, either on its own or mixed with condiments like soy sauce, mustard, or scallions. It is also used as an ingredient in various dishes, such as natto maki (natto rolled in seaweed), natto onigiri (natto-filled rice balls), and natto soup. Natto is particularly popular in the Tōhoku region of Japan, where it is a staple part of the local diet.
Natto is highly nutritious, being a good source of protein, fiber, vitamins, and minerals. It also contains enzymes and probiotics that are believed to have various health benefits, such as aiding digestion and boosting the immune system. Due to its unique texture and flavor, natto is an acquired taste for many, and its strong aroma can be off-putting to some.
While traditional natto is made using a natural fermentation process, there are also commercially produced versions that are more uniform in texture and flavor. These mass-produced natto products often include added ingredients like sugar or salt to modify the taste and consistency.
In addition to its culinary uses, natto has also found applications in traditional Japanese medicine, where it is believed to have various therapeutic properties. Some people consume natto regularly as a health supplement, while others use it topically for its purported skin-nourishing benefits.
Despite its strong and distinctive flavor, natto has gained popularity beyond its traditional Japanese roots, with growing interest in its nutritional value and unique culinary properties. It is now available in Asian grocery stores and specialty food markets around the world, allowing more people to experience this unique and ancient Japanese delicacy.