Miso (みそor味噌) is a traditionalJapanese seasoning. It is a thick paste produced byfermentingsoybeans with salt andkōji (the fungusAspergillus oryzae), and sometimes rice, barley,seaweed, or other ingredients. It is used for sauces and spreads; pickling vegetables, fish, or meats; and mixing withdashisoup stock to serve asmiso soup, a Japanese culinary staple food. Miso is high in protein and rich in minerals, and it played an important nutritional role infeudal Japan. Miso is widely used in both traditional and modern cooking in Japan, and as of 2018 had been gaining worldwide interest.[1]
Typically, miso is salty, but its flavor and aroma depend on the ingredients and fermentation process. Different varieties of miso have been variously described as salty, sweet, earthy, fruity, orsavory.
The origin of miso in Japan is not completely clear.
Grain andfish misos had been manufactured in Japan since theNeolithic era (Jōmon period, 14,000–300 BC).[2] These are calledjōmon miso and are similar to the early fish- and soy-based sauces produced throughout East Asia.
This miso predecessor originated in China during the third century BC.Hishio (醤) and other fermented soy-based foods likely were introduced to Japan at the same time as Buddhism in the sixth century AD.[3][4] This fermented food was calledshi (Chinese:豉;pinyin:Shì). The beginning of the current origin of miso ismishō ormishou (未醤) in theNara period (710–794);[5][6] withhishio still meaning beans. It is believed that the word changed toMisho and thenMiso.[5][6]
In theKamakura period (1185–1333), a common meal was made up of a bowl of rice, some dried fish, a serving of miso, and a fresh vegetable. Until theMuromachi period (1337 to 1573), miso was made without grinding the soybeans, somewhat likenattō. In the Muromachi era,Buddhist monks discovered that soybeans could be ground into a paste, spawning new methods using miso to flavor other foods. In medieval times, the wordtemaemiso, meaning homemade miso, appeared. Miso production is relatively simple, so homemade versions spread throughout Japan. Miso was used as military provisions during theSengoku period, and making miso was an important economic activity fordaimyōs of that era.
During theEdo period (1603–1868), miso was also calledhishio (醤) andkuki (豆支)[7][8] and various types of miso that fit with each local climate and culture emerged throughout Japan.
Today, miso is produced industrially in large quantities, and traditional homemade miso has become a rarity. In recent years, many new types of miso have appeared, including ones with added soup stocks or calcium, made with beans other than soy, or having reduced salt for health, among other varieties available.
The ingredients used to produce miso may include any mix ofsoybeans, barley, rice,buckwheat,millet,rye, wheat,hemp seed, andcycad, among others. Lately, producers in other countries have also begun selling miso made from chickpeas, corn,azuki beans,amaranth, andquinoa. Fermentation time ranges from as little as five days to several years. The variety of Japanese miso is difficult to classify but is commonly done by grain type, color, taste, and background.
Many regions have their own specific variation on the miso standard. For example, thesoybeans used inSendai miso are much more coarsely mashed than in normal soy miso.
Miso made with rice such asshinshu miso (信州味噌) andshiro miso (白味噌) is calledkome miso (米味噌).
Miso's taste, aroma, texture, and appearance vary by region and season. Other important variables that contribute to a particular miso's flavor include temperature,fermentation duration, salt content, variety ofkōji, and fermenting vessel. The most common flavor categories of miso are:
Shiromiso (白味噌), "white miso"
Akamiso (赤味噌), "red miso"
Awasemiso (合わせ味噌), "mixed miso"
Although white and red (shiromiso andakamiso) are the most common misos available, different varieties may be preferred in particular regions of Japan. In the easternKantō region that includes Tokyo, the darker brownishakamiso is popular while in the westernKansai region encompassingOsaka,Kyoto, andKobe, the lightershiromiso is preferred.
A more nuanced breakdown of the flavors is as follows:
Kome miso (米味噌) or "rice miso" can be yellow, yellowish white, red, etc. Whitish miso is made from boiled soybeans, and reddish miso is made from steamed soybeans.Kome miso is consumed more in eastern Japan and the Hokuriku and Kinki areas.
Mugi miso (麦味噌) or "barley miso" is a whitish miso produced in Kyushu, western Chugoku, and Shikoku areas. Another reddishmugi miso is produced in the northern Kanto area.Mugi miso has a peculiar smell.
Mame miso (豆味噌) or "soybean miso" is a darker, more reddish brown thankome miso. This is not as sweet as some other varieties, but it has some astringency and goodumami (旨味) flavor. This miso requires a long maturing term.Mame miso is consumed mostly in Aichi prefecture, Gifu prefecture, and Mie prefecture. Soybean (grain-free) miso is also labeledhatchō miso (八丁味噌).[11]Hatchō miso is anOkazaki, Aichi specialty and has its origins inMikawa Province during theSengoku period. The processing method with large wooden barrels and stones on the lid remains unchanged.
Chōgō (調合) orAwase (合わせ) miso, or "mixed miso", comes in many types because it is a mixture or compound of other varieties of miso. This may improve the weak points of each type of miso. For example,mame miso is very salty, but when combined withkome miso, the finished product has a mild taste.
Akamiso (赤味噌) or red miso is aged, sometimes for more than one year. As a result, due to theMaillard reaction, the color changes gradually from white to red or black, thus giving it the name red miso. Characteristics of the flavor are saltiness and some astringency with umami. It is often a much stronger-tasting miso. Factors in the depth of color are the formula of the soybeans and the quantity used. Generally, steamed soybeans are more deeply colored than boiled soybeans.
Shiromiso (白味噌) or white miso is the most widely produced miso, made in many regions of the country. Its main ingredients are rice, barley, and a small quantity of soybeans. If more soybeans were added, the miso would be red or brown. Compared with red miso, white miso has a very short fermentation time. The taste is sweet, and the umami is soft or light (compared to red miso).
The distinct and unique aroma of miso determines its quality. Many reactions occur among the components of miso, primarily the Maillard reaction, a non-enzymatic reaction of an amino group with a reducing sugar. The volatile compounds produced from this reaction give miso its characteristic flavor and aroma. Depending on the microorganism in combination with the variety of soybean or cereal used, many flavor compounds are produced that give rise to the different types of miso. Fermentation products such asfuranone compounds, including 4-hydroxy-2(or 5)-ethyl-5(or 2)-methyl-3(2H)-furanone (HEMF) and 4-hydroxy-2,5 dimethyl-3(2H)-furanone (HDMF) are novel flavor compounds of miso.[12] HEMF is especially known for its sweet aroma and is very important for the sensory evaluation of the aroma of rice miso.[12]
The unique sensory properties of miso are complex. The key factor in the final product's overall quality is the microorganisms' enzymatic activity. They use the composition of miso (rice, barley, and soybeans) to produce different pigments, flavors, and aroma compounds.
Proteolysis of soybean protein produces constituent amino acids that impart anumami taste that enhances the relatively dull taste of soybean by itself.[12] Soy protein contains a substantial amount ofglutamate, the salt of which is known as MSG ormonosodium glutamate, a popular ingredient used by food manufacturers to improve the taste of their products.[13] The umami effect of MSG itself is one-dimensional. The umami taste of miso is multidimensional because of the myriad amino acids and fermentation products.
Barley miso is a traditional farmhouse variety made for personal use. Often called "rural miso", domestic barley is used more than imported barley. Containing glutamic acid and aromatic compounds such asferulic acid andvanillic acid, barley miso is distinguished by a characteristic flavor.[12]
Miso's unique properties and flavor profile can be attributed to the compounds produced through the fermentation process. Miso, depending on the variety, consists of a starter culture calledkōji (麹), soybeans, and usually a grain (either rice, barley, or rye).[14] The miso goes through a two-step process; first creating thekōji, and second thekōji is combined with the other components, and the mixture is left to be enzymatically digested, fermented and aged.
Koji is produced by introducing themoldAspergillus oryzae onto steamed white rice. This mold culture comes from driedA. oryzae spores calledtane-kōji (種麹,たねこうじ) or "starter koji" and is isolated from plant matter (usually rice) and cultivated.[15] In the past, the natural presence ofA. oryzae spores was relied upon to create koji, but because of the difficulty of producing the culture,tane-kōji is added almost exclusively in both industrial and traditional production of miso.Tane-kōji is produced much in the same way as koji, but also has a small portion of wood ash added to the mixture[16] which gives important nutrients to the fungus as well as promotingsporulation.
A. oryzae is an aerobic fungus and is the most active fermenting agent in koji[14] as it producesamylolytic, and proteolytic enzymes which are essential to creating the final miso product. Amylolytic enzymes such as amylase aid in the breakdown of starch in the grains to sugar and dextrin,[17] while proteolytic enzymes such as protease catalyze the breakdown of proteins into smaller peptides or amino acids. These both aid in the enzymatic digestion of rice and soybeans. Depending on the strain ofA. oryzae, the enzymatic composition varies, thereby changing the characteristics of the final miso product. For example, the strain used to create the sweeter white miso would likely produce a higher content of amylolytic enzymes, while comparatively, soybean miso might have a higher content of proteolytic enzymes.
To create optimal conditions for enzymatic production and the growth ofA. oryzae, the koji's environment must be carefully regulated. Temperature, humidity, and oxygen content are all important factors in maximizing mold growth and enzyme production and preventing other harmful bacteria from producing. Once the koji has reached a desirable flavor profile, it is usually mixed with salt to prevent further fermentation.[18]
Although other strains of fungi have been used to produce koji,A. oryzae is the most desirable because of several properties, including the fact that it does not produceaflatoxin.[16]
Miso typically comes as a paste in a sealed container requiring refrigeration after opening. Natural miso is a living food containing manybeneficial microorganisms such asTetragenococcus halophilus, which can be killed by overcooking. For this reason, the miso should be added to soups or other foods prepared just before they are removed from the heat. Using miso without any cooking may be even better.[19]
Miso is a part of many Japanese-style meals. It most commonly appears as the main ingredient ofmiso soup, which is eaten daily by much of the Japanese population. The pairing of plain rice and miso soup is a fundamental unit ofJapanese cuisine. This pairing is the basis of a traditional Japanese breakfast.
Miso is used in many other types of soup and soup-like dishes, including some kinds oframen,udon,nabe, andimoni. Generally, such dishes have the title miso prefixed to their name (for example,miso-udon) and have a heavier, earthier flavor and aroma than other Japanese soups that are not miso-based.
Tonkatsu (fried pork cutlet) with miso based sauce
Many traditional confections use a sweet, thick miso glaze, such asmochi anddango. Miso-glazed treats are strongly associated withJapanese festivals, although they are available year-round at supermarkets. The consistency of miso glaze ranges from thick andtaffy-like to thin and drippy.
marinades: fish or chicken can be mixed with miso andrice wine overnight to be grilled
corn on the cob in Japan is often coated withshiro miso, wrapped in foil and grilled
sauces: sauces likemisoyaki (a variant onteriyaki)
dips: used as a dip to eat with vegetables (e.g., cucumbers, daikon,carrots, etc.)
side dish: miso is often eaten as a condiment and a side dish. Mixed or cooked miso with spices or vegetables is calledokazu-miso (おかず味噌), often eaten along with hot rice or spread overonigiri
Claims that miso is high invitamin B12 have been contradicted in some studies.[21]
Some experts suggest that miso is a source ofLactobacillus acidophilus.[22] Miso is relatively high in salt which could contribute to increased blood pressure in the small percentage of the population with sodium-sensitiveprehypertension orhypertension. Several studies using salt-sensitive hypertensive models and analyzing long-term intake have suggested that miso lessens salt's effects on blood pressure.[23][24][25]
^abcdSteinkraus, Keith (2004).Industrialization of Indigenous Fermented Foods, Revised and Expanded. CRC Press. pp. 99–142.
^Inoue, Yutaka (2016). "Analysis of the cooked aroma and odorants that contribute to umami aftertaste of soy miso (Japanese soybean paste)".Food Chemistry.213:521–528.doi:10.1016/j.foodchem.2016.06.106.PMID27451212.
^abDavidson, Jaine; Alan, Tom (2014)."miso" The Oxford Companion to Food (3 ed.). Oxford University Press.ISBN9780199677337.
^Steinkraus, Keith H., ed. (1989).Industrialization of indigenous fermented foods. New York: M. Dekker. pp. 99–112.ISBN978-0824780746.
^abRobinson, Richard K. (2000).Encyclopedia of Food Microbiology, Volumes 1–3. Elsevier. pp. 66, 67.
^"amylolytic, adj".OED Online. Oxford University Press. Retrieved12 March 2016.
^"Vitamin B12".The Vegetarian Society. The Vegetarian Society of the United Kingdom Limited. Archived fromthe original on August 22, 2008. RetrievedDecember 28, 2010.
^Ehrlich, Steven D. (2011-05-24)."Lactobacillus acidophilus". University of Maryland Medical Center (UMMC). Retrieved2013-11-20.
^Du, Dong Dong; Yoshinaga, Mariko; Sonoda, Masaru; Kawakubo, Kiyoshi; Uehara, Yoshio (2014). "Blood pressure reduction by Japanese traditional Miso is associated with increased diuresis and natriuresis through dopamine system in Dahl salt-sensitive rats".Clinical and Experimental Hypertension.36 (5):359–366.doi:10.3109/10641963.2013.827702.ISSN1525-6006.PMID24047246.S2CID207516579.