Mirin (味醂 or みりん, Japanese: [miɾiɴ]) is a type of rice wine and a common ingredient in Japanese cooking. It is similar to sake but with a lower alcohol content and higher sugar content. The sugar content is a complex carbohydrate that forms naturally during the fermentation process; no sugars are added. The alcohol content is further lowered when the liquid is heated.
Three types of mirin are common. The first is hon mirin (literally: true mirin), which contains about 14% alcohol and is produced by a 40 to 60 day mashing (saccharification) process. The second is shio mirin (literally: salt mirin), which contains a minimum of 1.5% salt to prevent consumption in order to avoid alcohol tax. The third is shin mirin (literally: new mirin), or mirin-fu chomiryo (literally: mirin-like seasoning), which contains less than 1% alcohol, yet retains the same flavor.
In the Edo period, mirin was consumed as amazake. O-toso, traditionally consumed for the Japanese New Year, can be made by soaking a spice mixture in mirin.
In the Kansai style of cooking, mirin is briefly boiled before using, to allow some of the alcohol to evaporate. In the Kantō regional style, the mirin is used untreated. Kansai-style boiled mirin is called nikiri mirin (煮切り味醂) (literally: thoroughly boiled mirin).
Mirin is used to add a bright touch to grilled or broiled fish or to erase the fishy smell. A small amount is often used instead of sugar and soy sauce. Its flavor is quite strong. It is sometimes used to accompany sushi.
November 30 has been designated the day of hon-mirin by the mirin industry, because in Japanese wordplay, the date words sound like '11' (いい, good) and '30' (みりん, mirin).
Mirin is also an ingredient of other sauces:
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they fill the pan with about 500 bones of eel, and simmer it for 2 to 3 hours.