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Shimeji

life science Maturity 11-13 Next article →

Shimeji refers to a group of edible mushrooms native to East Asia. These fungi are also found in northern Europe. They are highly valued in cooking for their rich umami flavors. Umami is a savory taste found in many foods. Shimeji mushrooms contain specific compounds that create this effect. These include guanylic acid, glutamic acid, and aspartic acid.

Asian mushrooms
Asian mushrooms

Scientists categorize these mushrooms based on how they get their food. Most species in this group are saprotrophs. A saprotroph is an organism that gets nutrients from decaying organic matter. This includes species like the buna-shimeji, also called the brown beech mushroom. It is also known as the brown clamshell mushroom. However, the hon-shimeji is different. It is a mycorrhizal fungus. This means it forms a relationship with the roots of living trees. Because of this complex relationship, hon-shimeji is much more difficult to cultivate in a controlled setting.

There are several distinct types of shimeji sold in markets today. The buna-shimeji, or Hypsizygus tessulatus, is a widely cultivated saprotroph. Another variety is the bunapi-shimeji, known as the white beech or white clamshell mushroom. This white variety was created through a specific selection process. Researchers at the Hokuto Corporation used UV-irradiation on buna-shimeji to select new traits. They combined 'hokuto #8' and 'hokuto #12' to create a new breed. This breed was registered as 'hokuto shiro #1'.

Japanese Hokto Bunapie 2
Japanese Hokto Bunapie 2

Other species are also grouped under the shimeji name. The hatake-shimeji, or Lyophyllum decastes, is one such type. The shirotamogidake, or Hypsizygus ulmarius, is another. Both of these have been sold under the name hon-shimeji in the past. There is also the velvet pioppino, which is scientifically known as Agrocybe aegerita. This mushroom is also called the black poplar mushroom.

Lyophyllum shimeji
Lyophyllum shimeji

Humans have developed specialized methods to grow these mushrooms commercially. The cultivation of buna-shimeji was first patented by Takara Shuzo Co., Ltd. in 1972. Following this patent, large-scale production began in Japan in 1973. Since then, several groups have patented their own cultivation methods. These include companies like Takara Bio and Yamasa. Today, many different breeds are grown and sold fresh in markets worldwide.

Shimeji mushrooms offer many potential health benefits due to their chemical makeup. They are rich in essential minerals. These include potassium, phosphorus, magnesium, zinc, and copper. The mushrooms also contain an oligopeptide called an ACE inhibitor. This substance may help lower blood pressure and reduce stroke risks in people with hypertension. Furthermore, shimeji can help lower cholesterol levels in the body.

Lyophyllum shimeji
Lyophyllum shimeji

Research shows that these mushrooms contain many bioactive compounds. They are rich in glycoproteins like HM-3A and substances such as marmorin. They also contain beta-(1-3)-glucan, hypsiziprenol, and hypsin. These compounds make the mushrooms potential natural anticancer agents. They also contain polysaccharides, phenolic compounds, and flavonoids. These help inhibit inflammatory cytokines and oxidative stress. This action may help protect against lung failure. Because they use radical scavenging activity, they are also considered antioxidants.

When preparing shimeji, you should always cook them before eating. It is not recommended to serve them raw. Raw shimeji can have a somewhat bitter taste. However, this bitterness disappears completely once the mushroom is cooked. Cooking also makes the mushrooms easier for the body to digest. Once cooked, they have a pleasant, firm, and slightly crunchy texture. They also possess a slightly nutty flavor.

Asian mushrooms
Asian mushrooms

There are many ways to use shimeji in culinary dishes. They work very well in stir-fried vegetables or with seafood. They are also excellent when paired with wild game. You can add them to soups, stews, and various sauces. In Japanese cuisine, they are used in dishes like nabe and takikomi gohan. You can sauté them whole by cutting off only the very end of the stem. For a different result, you can slow roast them at a low temperature with a small amount of butter or oil.

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Asian mushrooms.jpg
File:Lyophyllum shimeji.jpg
Lyophyllum shimeji.jpg
File:Japanese_Hokto_Bunapie_2.JPG
Japanese_Hokto_Bunapie_2.JPG
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