Sushi

Sushi (すし, 寿司, 鮨, 鮓, pronounced [sɯɕiꜜ] or [sɯꜜɕi]) is a Japanese dish of prepared vinegared rice (鮨飯, sushi-meshi), usually with some sugar and salt, accompanied by a variety of ingredients (ねた, neta), such as seafood, often raw, and vegetables. Styles of sushi and its presentation vary widely, but the one key ingredient is "sushi rice", also referred to as shari (しゃり), or sumeshi (酢飯).[1]

Sushi
Place of originJapan
Main ingredients
  • Vinegared rice
  • Nori

The inventor of modern sushi is believed to be Hanaya Yohei, who invented nigiri-zushi, a type of sushi most known today, in which seafood is placed on hand-pressed vinegared rice, around 1824 in the Edo period (1603–1867). It was the fast food of the chōnin class in the Edo period.[2][3][4]

Sushi is traditionally made with medium-grain white rice, though it can be prepared with brown rice or short-grain rice. It is very often prepared with seafood, such as squid, eel, yellowtail, salmon, tuna or imitation crab meat. Many types of sushi are vegetarian. It is often served with pickled ginger (gari), wasabi, and soy sauce. Daikon radish or pickled daikon (takuan) are popular garnishes for the dish.

Sushi is sometimes confused with sashimi, a similar dish in Japanese cuisine that consists of thinly sliced raw fish or occasionally meat.[5]

History
President Barack Obama and Prime Minister Shinzo Abe at Sukiyabashi Jiro
Sushi by Hiroshige

A dish known as narezushi (馴れ寿司, 熟寿司, "salted fish"), stored in fermented rice for possibly months at a time, has been cited as one of the early influences for the Japanese practice of applying rice on raw fish.[6] The fish was fermented with rice vinegar, salt and rice, after which the rice was discarded. The process can be traced back to the early domestication of rice in the Neolithic cultures of China. Fermentation methods following similar logic in other Asian rice cultures include prahok (ប្រហុក), pla ra (ปลาร้า), burong isda, sikhae (식해), and amazake (甘酒).[6][7]

The lacto-fermentation of the rice prevents the fish from spoiling. When wet-field rice cultivation was introduced during the Yayoi period, lakes and rivers would flood during the rainy season and fish would get caught in the rice paddy fields. Pickling was a way to preserve the excess fish and guarantee food for the next months, and narezushi became an important source of protein for Japanese consumers. The term sushi literally means "sour-tasting", as the overall dish has a sour and umami or savoury taste. The term comes from an antiquated し shi terminal-form conjugation, no longer used in other contexts, of the adjectival verb sui (酸い, "to be sour"),[8] resulting in the term sushi (酸し).[9] Narezushi still exists as a regional specialty, notably as funa-zushi from Shiga Prefecture.[10] Vinegar began to be added to the preparation of narezushi in the Muromachi period (1336–1573) for the sake of enhancing both taste and preservation. In addition to increasing the sourness of the rice, the vinegar significantly increased the dish's longevity, causing the fermentation process to be shortened and eventually abandoned. The primitive sushi would be further developed in Osaka, where over several centuries it became oshi-zushi or hako-zushi; in this preparation, the seafood and rice were pressed into shape with wooden (typically bamboo) molds.

It was not until the Edo period (1603–1868) that fresh fish was served over vinegared rice and nori. The particular style of today's nigirizushi became popular in Edo (contemporary Tokyo) in the 1820s or 1830s. One common story of nigirizushi's origins is of the chef Hanaya Yohei (1799–1858), who invented or perfected the technique in 1824 at his shop in Ryōgoku.[10] The dish was originally termed Edomae zushi as it used freshly caught fish from the Edo-mae (Edo or Tokyo Bay); the term Edomae nigirizushi is still used today as a by-word for quality sushi, regardless of its ingredients' origins.[11][12]

The earliest written mention of sushi in English described in the Oxford English Dictionary is in an 1893 book, A Japanese Interior, where it mentions sushi as "a roll of cold rice with fish, sea-weed, or some other flavoring".[13][14] There is an earlier mention of sushi in James Hepburn's Japanese–English dictionary from 1873,[15] and an 1879 article on Japanese cookery in the journal Notes and Queries.[16]

Types
Sushi platter in a takeaway

The common ingredient in all types of sushi is vinegared sushi rice. Fillings, toppings, condiments, and preparation vary widely.[17]

Due to rendaku consonant mutation, sushi is pronounced with zu instead of su when a prefix is attached, as in nigirizushi.

Chirashizushi
Chirashizushi with raw ingredients

Chirashizushi (ちらし寿司, "scattered sushi", also referred to as barazushi) serves the rice in a bowl and tops it with a variety of raw fish and vegetable garnishes. It is popular because it is filling, fast and easy to make.[18] It is eaten annually on Hinamatsuri in March and Kodomonohi in May.

  • Edomae chirashizushi (Edo-style scattered sushi) is served with uncooked ingredients in an artful arrangement.
  • Gomokuzushi (Kansai-style sushi) consists of cooked or uncooked ingredients mixed in the body of rice.
  • Sake-zushi (Kyushu-style sushi) uses rice wine over vinegar in preparing the rice, and is topped with shrimp, sea bream, octopus, shiitake mushrooms, bamboo shoots and shredded omelette.

Inarizushi
Three pieces of inarizushi
Wikibooks Cookbook has a recipe/module on

稲荷寿司 (Inarizushi) is a pouch of fried tofu typically filled with sushi rice alone. Tales tell that inarizushi is named after the Shinto god Inari. Foxes, messengers of Inari, are believed to have a fondness for fried tofu, and an inarizushi roll has pointed corners that resemble fox ears.[19]

Regional variations include pouches made of a thin omelette (帛紗寿司, fukusa-zushi, or 茶巾寿司, chakin-zushi) instead of tofu. It should not be confused with inari maki, which is a roll filled with flavored fried tofu.

Cone sushi is a variant of inarizushi originating in Hawaii that may include green beans, carrots, or gobo along with rice, wrapped in a triangular abura-age piece. It is often sold in okazu-ya (Japanese delis) and as a component of bento boxes.[20][21][22][23]

Makizushi

Makizushi (巻き寿司, "rolled sushi"), norimaki (海苔巻き, "nori roll", used generically for other dishes as well) or makimono (巻物, "variety of rolls") is a cylindrical piece formed with the help of a mat known as a makisu (巻き簾). Makizushi is generally wrapped in nori (seaweed), but is occasionally wrapped in a thin omelette, soy paper, cucumber, or shiso (perilla) leaves. Makizushi is often cut into six or eight pieces, which constitutes a single roll order. Short-grain white rice is usually used, although short-grain brown rice, like olive oil on nori, is now becoming more widespread among the health-conscious. Rarely, sweet rice is mixed in makizushi rice.

Nowadays, the rice in makizushi can be many kinds of black rice, boiled rice and cereals. Besides the common ingredients listed above, some varieties may include cheese, spicy cooked squid, yakiniku, kamaboko, lunch meat, sausage, bacon or spicy tuna. The nori may be brushed with sesame oil or sprinkled with sesame seeds. In a variation, sliced pieces of makizushi may be lightly fried with egg coating.

Below are some common types of makizushi, but many other kinds exist.

  • Futomaki (太巻, "thick, large, or fat rolls") is a large, cylindrical style of sushi, usually with nori on the outside.[24] A typical futomaki is five to six centimetres (2 to 2+1⁄2 in) in diameter.[25] They are often made with two, three, or more fillings that are chosen for their complementary tastes and colors. Futomaki are often vegetarian, and may utilize strips of cucumber, kampyō gourd, takenoko (bamboo shoots), or lotus root. Strips of tamagoyaki omelette, tiny fish roe, chopped tuna, and oboro whitefish flakes are typical non-vegetarian fillings.[24] Traditionally, the vinegared rice is lightly seasoned with salt and sugar. Popular proteins are fish cakes, imitation crab meat, egg, tuna, or shrimp. Vegetables usually include cucumbers, lettuces, and takuan (沢庵, pickled radish).
  • Tamago makizushi (玉子巻き寿司) is makizushi is rolled out by a thin egg.
  • Tempura makizushi (天ぷら 巻き寿司) or agezushi (揚げ寿司ロール) is a fried version of the dish.
  • During the evening of the festival of Setsubun (節分), it is traditional in the Kansai region to eat a particular kind of futomaki in its uncut cylindrical form, called ehōmaki (惠方巻, "lucky direction roll").[26] By 2000 the custom had spread to all of Japan.[27] Ehōmaki is roll composed of seven ingredients considered to be lucky. The typical ingredients include kanpyō, egg, eel, and shiitake. Ehōmaki often include other ingredients too. People usually eat the ehōmaki while facing the direction considered to be auspicious that year.[28]
  • Hosomaki (細巻, "thin rolls") is a type of small cylindrical sushi, with nori on the outside. A typical hosomaki has a diameter of about 2.5 centimetres (1 in).[25] They generally contain only one filling, often tuna, cucumber, kanpyō, nattō, umeboshi paste, and squid with shiso (Japanese herb).
    • Kappamaki (河童巻) is a kind of hosomaki filled with cucumber. It is named after the Japanese legendary water imp, fond of cucumbers, called the kappa. Traditionally, kappamaki is consumed to clear the palate between eating raw fish and other kinds of food, so that the flavors of the fish are distinct from the tastes of other foods.
    • Tekkamaki (鉄火巻) is a kind of hosomaki filled with raw tuna. Although it is believed that the word tekka, meaning "red hot iron", alludes to the color of the tuna flesh or salmon flesh, it actually originated as a quick snack to eat in gambling dens called tekkaba (鉄火場), much like the origins of the sandwich.[29][30]
    • Negitoromaki (ねぎとろ巻) is a kind of hosomaki filled with negitoro, aka scallion (negi) and chopped tuna (toro). Fatty tuna is often used in this style.
    • Tsunamayomaki (ツナマヨ巻) is a kind of hosomaki filled with canned tuna tossed with mayonnaise.
  • Temaki (手巻, "hand roll") is a large cone-shaped style of sushi with nori on the outside and the ingredients spilling out the wide end. A typical temaki is about 10 centimetres (4 in) long, and is eaten with the fingers because it is too awkward to pick it up with chopsticks. For optimal taste and texture, temaki must be eaten quickly after being made because the nori cone soon absorbs moisture from the filling and loses its crispness, making it somewhat difficult to bite through. For this reason, the nori in pre-made or take-out temaki is sealed in plastic film which is removed immediately before eating.[31]
  • Makizushi topped with tobiko
  • Makizushi in preparation
  • Futomaki
  • Kappamaki
  • Nattōmaki
  • Tekkamaki
  • Ehōmaki

Modern narezushi
Funa-zushi (narezushi made from nigorobuna)

Narezushi (熟れ寿司, "matured sushi") is a traditional form of fermented sushi. Skinned and gutted fish are stuffed with salt, placed in a wooden barrel, doused with salt again, then weighed down with a heavy tsukemonoishi (pickling stone). As days pass, water seeps out and is removed. After six months, this sushi can be eaten, remaining edible for another six months or more.[32]

The most famous variety of narezushi are the ones offered as a specialty dish of Shiga Prefecture,[33] particularly the funa-zushi made from fish of the crucian carp genus, the authentic version of which calls for the use of nigorobuna, a particular locally differentiated variety of wild goldfish endemic to Lake Biwa.[34]

Nigirizushi

Nigirizushi
Several types of nigirizushi, rice hand-pressed with various seafood, including tuna, eel, and sea urchin roe gunkanmaki

Nigirizushi (握り寿司, "hand-pressed sushi") consists of an oblong mound of sushi rice that the chef presses between the palms of the hands to form an oval-shaped ball, and a topping (the neta) draped over the ball. It is usually served with a bit of wasabi; toppings are typically fish such as salmon, tuna or other seafood. Certain toppings are typically bound to the rice with a thin strip of nori, most commonly octopus (tako), freshwater eel (unagi), sea eel (anago), squid (ika), and sweet egg (tamago). One order of a given type of fish typically results in two pieces, while a sushi set (sampler dish) may contain only one piece of each topping.

Gunkanmaki (軍艦巻, "warship roll") is a special type of nigirizushi: an oval, hand-formed clump of sushi rice that has a strip of nori wrapped around its perimeter to form a vessel that is filled with some soft, loose or fine-chopped ingredient that requires the confinement of nori such as roe, nattō, oysters, uni (sea urchin roe), sweetcorn with mayonnaise, scallops, and quail eggs. Gunkan-maki was invented at the Ginza Kyubey restaurant in 1941; its invention significantly expanded the repertoire of soft toppings used in sushi.[35][36]

Temarizushi (手まり寿司, "ball sushi") is a style of sushi made by pressing rice and fish into a ball-shaped form by hand using a plastic wrap.

Oshizushi
Japanese cutlassfish oshizushi at a restaurant in Minamata City, Kumamoto Prefecture
Oshi-zushi (Pressed sushi)

Oshizushi (押し寿司, "pressed sushi"), also known as hako-zushi (箱寿司, "box sushi"), is a pressed sushi from the Kansai region, a favorite and specialty of Osaka. A block-shaped piece is formed using a wooden mold, called an oshibako. The chef lines the bottom of the oshibako with the toppings, covers them with sushi rice, and then presses the lid of the mold down to create a compact, rectilinear block. The block is removed from the mold and then cut into bite-sized pieces. Particularly famous is battera (バッテラ, pressed mackerel sushi) or saba zushi (鯖寿司).[37] In oshizushi, all the ingredients are either cooked or cured and raw fish is never used.[38]

Oshizushi wrapped in persimmon leaves, a specialty of Nara, is known as kakinohazushi (柿の葉寿司).

Western-style sushi
Norway roll (ノルウェー巻き). A Norwegian businessman introduced the use of salmon as a sushi ingredient to Japan in the 1980s.[39]

The increasing popularity of sushi around the world has resulted in variations typically found in the Western world, but rarely in Japan. A notable exception to this is the use of salmon. Historically, the Japanese have eaten salmon since prehistory; however, caught salmon in nature often contains parasites and must be cooked or cured for its lean meat to be edible - therefore, unsuitable as raw meat. On the other side of the world, in the 1960s and 1970s, Norwegian entrepreneurs started experimenting with aquaculture farming. The big breakthrough was when they figured out how to raise salmon in net pens in the sea. Being farm raised, the Atlantic salmon reportedly showed advantages over the Pacific salmon, such as no parasites, easy animal capture and could be grown with higher fat content. With government subsidies and improved techniques, they were so successful in raising fatty and parasite-free salmon, they ended up with a surplus. The country of Norway has a small population and limited market, therefore they looked to other countries to export their salmon. The first Norwegian salmon was imported into Japan in 1980, accepted in the conventional way, for grilling, and not for sushi. Salmon had already been consumed in North America as an ingredient in sushi as early as the 1970s.[40][41][42] Salmon sushi did not become widely accepted in Japan until a successful marketing partnership in the late 1980s between a Norwegian businessman tasked with helping the Norwegian salmon industry and the Japanese food supplier Nichirei.[43][44][39]

Other sushi creations to suit the Western palate were initially fueled by the invention of the California roll (a norimaki with crab or imitation crab, cucumber, and avocado). A wide variety of popular rolls (norimaki and uramaki) have evolved since. 'Norway roll' is another variant of uramakizushi filled with tamago (omelette), imitation crab and cucumber, rolled with shiso leaf and nori, topped with slices of Norwegian salmon, garnished with lemon and mayonnaise.[45]

Uramaki
Uramakizushi rolls

Uramaki (裏巻, "inside-out roll") is a medium-sized cylindrical style of sushi with two or more fillings, and was developed as a result of the creation of the California roll, as a method originally meant to hide the nori. Uramaki differs from other makimono because the rice is on the outside and the nori inside. The filling is in the center surrounded by nori, then a layer of rice, and optionally an outer coating of some other ingredients such as roe or toasted sesame seeds. It can be made with different fillings, such as tuna, crab meat, avocado, mayonnaise, cucumber or carrots.

Examples of variations include the rainbow roll (an inside-out topped with thinly sliced maguro, hamachi, ebi, sake and avocado) and the caterpillar roll (an inside-out topped with thinly sliced avocado). Also commonly found is the "rock and roll" (an inside-out roll with barbecued freshwater eel and avocado with toasted sesame seeds on the outside).

In Japan, uramaki is an uncommon type of makimono; because sushi is traditionally eaten by hand in Japan, the outer layer of rice can be quite difficult to handle with fingers.[46]

In Brazil, uramaki and other sushi pieces include cream cheese in their recipe. Uncommon for the traditional recipe, this is the most common type of ingredient used in preparation of sushi in the country. Temaki also often contains a large amount of cream cheese, and is extremely popular in restaurants.[47]

American-style makizushi
Rainbow roll, uramaki with multiple fillings including shrimp tempura, salmon, avocado, mango, with rice mixed with tobiko

Futomaki is a more popular variation of sushi within the United States, and comes in variations that take their names from their places of origin. Other rolls may include a variety of ingredients, including chopped scallops, spicy tuna, beef or chicken teriyaki roll, okra, and assorted vegetables such as cucumber and avocado, and the tempura roll, where shrimp tempura is inside the roll or the entire roll is battered and fried tempura-style. In the Southern United States, many sushi restaurants prepare rolls using crawfish. Sometimes, rolls are made with brown rice or black rice, known as forbidden rice, which appear in Japanese cuisine as well.

Per Food and Drug Administration regulations, raw fish served in the United States must be frozen prior to serving in order to kill parasites.[48]

Since rolls are often made to order it is not unusual for the customer to specify the exact ingredients desired (e.g. salmon roll, cucumber roll, avocado roll, tuna roll, shrimp or tuna tempura roll, etc.). Though the menu names of dishes often vary by restaurant, some examples include:

Sushi roll name Definition
Alaskan roll A variant of the California roll with smoked salmon on the inside, or layered on the outside.[49]
Boston roll An uramaki California roll with poached shrimp instead of imitation crab.[50]
British Columbia roll A roll containing grilled or barbecued salmon skin, cucumber, sweet sauce, sometimes with roe. Also sometimes referred to as salmon skin rolls outside of British Columbia, Canada.[51]
California roll A roll consisting of avocado, kani kama (imitation crab/crab stick) (also can contain real crab in "premium" varieties), cucumber, and tobiko, often made as uramaki (with rice on the outside, nori on the inside).[52]
Dynamite roll A roll including yellowtail (hamachi) or prawn tempura, and fillings such as bean sprouts, carrots, avocado, cucumber, chili, spicy mayonnaise, and roe.[53]
Hawaiian roll A roll containing shōyu tuna (canned), tamago, kanpyō, kamaboko, and the distinctive red and green hana ebi (shrimp powder).[54]
Mango roll A roll including fillings such as avocado, crab meat, tempura shrimp, mango slices, and topped off with a creamy mango paste.[55]
Michigan roll A roll including fillings such as spicy tuna, smelt roe, spicy sauce, avocado, and sushi rice. Is a variation on spicy tuna roll.[56]
New Mexico roll A roll originating in New Mexico; includes New Mexico green chile (sometimes tempura fried), teriyaki sauce, and rice.[57][58] Sometimes simply referred to as a "green chile (tempura) roll" within the state.[59][60]
Philadelphia roll A roll consisting of raw or smoked salmon, cream cheese (the name refers to Philadelphia cream cheese), cucumber or avocado, or onion.[61]
Rainbow roll A California uramaki roll with multiple types of fish (commonly yellowtail, tuna, salmon, snapper, white fish, eel, etc.) and avocado wrapped around it.[62]
Seattle roll A roll consisting of cucumber, avocado, cream cheese and raw or smoked salmon.[63]
Spicy tuna roll A roll including raw tuna mixed with sriracha mayonnaise.
Spider roll A roll including fried soft-shell crab and other fillings such as cucumber, avocado, daikon sprouts or lettuce, roe, and sometimes spicy mayonnaise.[64]
Sushi burrito A large, customizable roll offered in a number of "sushi burrito" restaurants in the United States.[65]

Canada

Many of the styles seen in the United States are also seen in Canada, as well as their own. Doshi (a portmanteau of sushi and doughnut) is a doughnut shaped ball of rice on a deep fried crab or imitation crab cake topped with sushi ingredients.[66] Maki Poutine is similar to makizushi in style except it is topped with cheese curds and gravy and contains duck confit, more cheese curds, and sweet potato tempura.[67] Sushi cake is made of crab meat, avocado, shiitake mushroom, salmon, spicy tuna, and tobiko and served on sushi rice then torched with spicy mayo, BBQ sauce, balsamic reduction, and dotted with caper and garlic chips.[68] Sushi pizza is a deep fried rice or crab/imitation crab cake topped with mayo and various sushi ingredients.[69]

Mexico and the Western United States

Sinaloan sushi originated in Sinaloa, Mexico, and has been available in the Western United States since 2013.[70]

Sushi in Asia

South Korea

Gimbap, similar to makizushi, is a popular take-out food in South Korea.[71] It consists of gim (nori flavored with sesame oil and salt) rolled around rice and a variety of ingredients such as vegetables and meat.[72]

Ingredients
Sushi chef preparing nigirizushi, Kyoto, Japan

All sushi has a base of specially prepared rice, complemented with other ingredients. Traditional Japanese sushi consisting of rice flavored with vinegar sauce and various raw or cooked ingredients.

Sushi-meshi

Sushi-meshi (鮨飯) (also known as su-meshi (酢飯), shari (舎利), or gohan (ご飯)) is a preparation of white, short-grained, Japanese rice mixed with a dressing consisting of rice vinegar, sugar, salt, and occasionally kombu and sake. It has to be cooled to room temperature before being used for a filling in a sushi or else it will get too sticky while being seasoned. Traditionally, it is mixed with a hangiri (a round, flat-bottom wooden tub or barrel) and a shamoji (a wooden paddle).

Sushi rice is prepared with short-grain Japanese rice, which has a consistency that differs from long-grain strains such as those from India, Sri Lanka, Bangladesh, Thailand, and Vietnam. The essential quality is its stickiness or glutinousness, although the type of rice used for sushi is different from glutinous rice. Freshly harvested rice (shinmai) typically contains too much water, and requires extra time to drain the rice cooker after washing. In some fusion cuisine restaurants, short-grain brown rice and wild rice are also used.

There are regional variations in sushi rice and individual chefs have their individual methods. Most of the variations are in the rice vinegar dressing: the Kantō region (or East Japan) version of the dressing commonly uses more salt; in Kansai region (or West Japan), the dressing has more sugar.

Nori
Sheets of nori

The dark green seaweed wrappers used in makimono are called nori (海苔). Nori is a type of algae, traditionally cultivated in the harbors of Japan. Originally, algae was scraped from dock pilings, rolled out into thin, edible sheets, and dried in the sun, in a process similar to making rice paper.[73] Today, the commercial product is farmed, processed, toasted, packaged, and sold in sheets.

The size of a nori sheet influences the size of makimono. A full-size sheet produces futomaki, and a half produces hosomaki and temaki. To produce gunkan and some other makimono, an appropriately-sized piece of nori is cut from a whole sheet.

Nori by itself is an edible snack and is available with salt or flavored with teriyaki sauce. The flavored variety, however, tends to be of lesser quality and is not suitable for sushi.

When making fukusazushi, a paper-thin omelette may replace a sheet of nori as the wrapping. The omelette is traditionally made on a rectangular omelette pan, known as a makiyakinabe, and used to form the pouch for the rice and fillings.[74]

Gu
Sushi made of meats other than fish (whether raw or cooked) is a variation often seen in Japan.
Yaki anago-ippon-nigiri (焼きアナゴ一本握り) – a roasted and sweet-sauced whole conger eel
Ebifurai-maki (エビフライ巻き) – fried-shrimp roll

The ingredients used inside sushi are called gu, and are, typically, varieties of fish.[75] For culinary, sanitary, and aesthetic reasons, the minimum quality and freshness of fish to be eaten raw must be superior to that of fish which is to be cooked. Sushi chefs are trained to recognize important attributes, including smell, color, firmness, and freedom from parasites that may go undetected in commercial inspection. Commonly used fish are tuna (maguro, shiro-maguro), Japanese amberjack, yellowtail (hamachi), snapper (kurodai), mackerel (saba), and salmon (sake). The most valued sushi ingredient is toro, the fatty cut of the fish.[76] This comes in a variety of ōtoro (often from the bluefin species of tuna) and chūtoro, meaning "middle toro", implying that it is halfway into the fattiness between toro and the regular cut. Aburi style refers to nigiri sushi where the fish is partially grilled (topside) and partially raw. Most nigiri sushi will have completely raw toppings, called neta.[75]

Other seafoods such as squid (ika), eel (anago and unagi), pike conger (hamo), octopus (tako), shrimp (ebi and amaebi), clam (mirugai, aoyagi and akagai), fish roe (ikura, masago, kazunoko and tobiko), sea urchin (uni), crab (kani), and various kinds of shellfish (abalone, prawn, scallop) are the most popular seafoods in sushi. Oysters, however, are less common, as the taste is thought to not go well with the rice. Kani kama, or imitation crab stick, is commonly substituted for real crab, most notably in California rolls.[77]

Pickled daikon radish (takuan) in shinko maki, pickled vegetables (tsukemono), fermented soybeans (nattō) in nattō maki, avocado, cucumber in kappa maki, asparagus,[78] yam, pickled ume (umeboshi), gourd (kanpyō), burdock (gobo), and sweet corn (sometimes mixed with mayonnaise) are plant products used in sushi.

Tofu, eggs (in the form of slightly sweet, layered omelette called tamagoyaki), and raw quail eggs (as a gunkan-maki topping) are also common.

Condiments

Sushi is commonly eaten with condiments. Sushi may be dipped in shōyu (soy sauce), and is usually flavored with wasabi, a piquant paste made from the grated stem of the Wasabia japonica plant. Japanese-style mayonnaise is a common condiment in Japan on salmon, pork and other sushi cuts.

The traditional grating tool for wasabi is a sharkskin grater or samegawa oroshi. An imitation wasabi (seiyo-wasabi), made from horseradish, mustard powder and green dye is common. It is found at lower-end kaiten-zushi restaurants, in bento box sushi and at most restaurants outside Japan. If manufactured in Japan, it may be labelled "Japanese Horseradish".[79] The spicy compound in both true and imitation wasabi is allyl isothiocyanate, which has well-known anti-microbial properties. However, true wasabi may contain some other antimicrobial as well.[80]

Gari (sweet, pickled ginger) is eaten in between sushi courses to both cleanse the palate and aid in digestion. In Japan, green tea (ocha) is invariably served together with sushi. Better sushi restaurants often use a distinctive premium tea known as mecha. In sushi vocabulary, green tea is known as agari.

Sushi may be garnished with gobo, grated daikon, thinly-sliced vegetables, carrots, radishes and cucumbers that have been shaped to look like flowers, real flowers, or seaweed salad.

When closely arranged on a tray, different pieces are often separated by green strips called baran or kiri-zasa (切り笹). These dividers prevent the flavors of neighboring pieces of sushi from mixing and help to achieve an attractive presentation. Originally, these were cut leaves from the Aspidistra elatior (葉蘭, haran) and Sasa veitchii (熊笹, kuma-zasa) plants, respectively. Using actual leaves had the added benefit of releasing antimicrobial phytoncides when cut thereby extending the limited shelf life of the sushi.[81]

Sushi bento boxes are a staple of Japanese supermarkets and convenience stores. As these stores began rising in prominence in the 1960s, the labor-intensive cut leaves were increasingly replaced with green plastic in order to lower costs. This coincided with the increased prevalence of refrigeration which acted to extend the shelf life of sushi without the need for the cut leaves. Today the plastic strips are commonly used in sushi bento boxes and to a lesser degree in sushi presentations found in sushi bars and restaurants. In store-sold or to-go packages of sushi, the plastic leaf strips are often used to prevent the rolls from coming into early or unwanted contact with the ginger and wasabi included with the dish.[82]

Nutrition
Sushi in shops are usually sold in plastic trays.

The main ingredients of traditional Japanese sushi, raw fish and rice, are naturally low in fat, high in protein, carbohydrates (the rice only), vitamins, and minerals, as are gari and nori. Other vegetables wrapped within the sushi also offer various vitamins and minerals. Many of the seafood ingredients also contain omega-3 fatty acids, which have a variety of health benefits.[83] The omega-3 fatty acids found in fish has certain beneficial properties, especially on cardiovascular health, natural anti-inflammatory compounds, and play a role in brain function.[84]

Generally sushi is not a particularly fattening food. However, rice in sushi contains a fair amount of carbohydrates, plus the addition of other ingredients such as mayonnaise added into sushi rolls might increase the caloric content.[85] Sushi also has a relatively high sodium content, especially contributed from soy sauce seasoning.[84]

Health risks
See also: Fish disease and parasites

Potential chemical and biological hazards in sushi include environmental contaminants, pathogens and toxins.

Large marine apex predators such as tuna (especially bluefin) can harbor high levels of methylmercury, one of many toxins of marine pollution. Frequent or significantly large consumption of methylmercury can lead to developmental defects when consumed by certain higher-risk groups, including women who are pregnant or may become pregnant, nursing mothers and young children.[86] A 2021 study in Catalonia, Spain reported that the estimated exposure to methylmercury in sushi consumption by adolescents exceeded the tolerable daily intake.[87]

A 2011 article reported approximately 18 million people infected with fish-borne flukes worldwide.[88] Such an infection can be dangerous for expecting mothers due to the health risks that medical interventions or treatment measures may pose on the developing fetus.[88] Parasitic infections can have a wide range of health impacts, including bowel obstruction, anemia, liver disease, and more.[88] The impact of these illnesses can pose some health concerns on the expecting mother and baby.[88]

Sashimi or other types of sushi containing raw fish present a risk of infection by three main types of parasites:

  • Clonorchis sinensis, a fluke which can cause clonorchiasis[89]
  • Anisakis, a roundworm which can cause anisakiasis[90]
  • Diphyllobothrium, a tapeworm which can cause diphyllobothriasis[91]

For these reasons, EU regulations forbid the use of fresh raw fish. It must be frozen at temperatures below −20 °C (−4 °F) in all parts of the product for no less than 24 hours.[92] As such, a number of fishing boats, suppliers and end users flash freeze fish for sushi to temperatures as low as −60 °C (−76 °F).[93] As well as parasite destruction, super-freezing also prevents oxidation of the blood in tuna flesh, thus preventing the discoloration that happens at temperatures above −20 °C (−4 °F).[94]

Calls for stricter analysis and regulation of seafood include improved product description. A 2021 DNA study in Italy found 30%-40% of fish species in sushi incorrectly described.[95]

Some forms of sushi, notably those containing the fugu pufferfish and some kinds of shellfish, can cause severe poisoning if not prepared properly. Particularly, fugu consumption can be fatal. Fugu fish has a lethal dose of tetrodotoxin in its internal organs and, by law in many countries, must be prepared by a licensed fugu chef who has passed the prefectural examination in Japan.[96] The licensing examination process consists of a written test, a fish-identification test, and a practical test that involves preparing the fugu and separating out the poisonous organs. Only about 35 percent of the applicants pass.[97]

Sustainable sushi

Sustainable sushi is sushi made from fished or farmed sources that can be maintained or whose future production does not significantly jeopardize the ecosystems from which it is acquired. Concerns over the sustainability of sushi ingredients arise from greater concerns over environmental, economic and social stability and human health.

Presentation
Sushi served on a wooden platter at a sushi restaurant in Kanagawa Prefecture, Japan
Sushi in restaurant in Vienna, Austria

Traditionally, sushi is served on minimalist Japanese-style, geometric, mono- or duo-tone wood or lacquer plates, in keeping with the aesthetic qualities of this cuisine.

Many sushi restaurants offer fixed-price sets, selected by the chef from the catch of the day. These are often graded as 松竹梅 (shō-chiku-bai), shō/matsu (松, pine), chiku/take (竹, bamboo), and bai/ume (梅, plum), with matsu the most expensive and ume the cheapest. Sushi restaurants will often have private booth dining, where guests are asked to remove their shoes, leaving them outside the room; However, most sushi bars offer diners a casual experience with an open dining room concept.

Meat sushi

Sushi may be served kaiten zushi (sushi train) style. Color-coded plates of sushi are placed on a conveyor belt; as the belt passes, customers choose as they please. After finishing, the bill is tallied by counting how many plates of each color have been taken. Newer kaiten zushi restaurants use barcodes or RFID tags embedded in the dishes to manage elapsed time after the item was prepared.[98]

There is a practice called nyotaimori which entails serving the sushi on the naked body of a woman.[99][100][101]

Glossary

Some specialized or slang terms are used in the sushi culture. Most of these terms are used only in sushi bars.

  • Agari: lit. 'Rise up', refers to green tea. Ocha (お茶) in usual Japanese.
  • Gari: Sweet, pickled and sliced ginger, or sushi ginger. Shōga (生姜) in standard Japanese.
  • Gyoku: "Jewel". Sweet, cube-shaped omelette. 卵焼, 玉子焼 (Tamagoyaki) in standard Japanese.
  • Murasaki: "Violet" or "purple" (color). Soy sauce. Shōyu (醤油) in standard Japanese.
  • Neta: Toppings on nigiri or fillings in makimono. A reversal of the standard Japanese tane (種).
  • Oaiso: "Compliment". Bill or check. Oaiso may be used in not only sushi bars but also izakaya.[102][103] Okanjō (お勘定) or chekku (チェック) in standard Japanese.
  • Otemoto: Chopsticks. Otemoto means the nearest thing to the customer seated. Hashi (箸) or ohashi in standard Japanese.
  • Sabi: Japanese horseradish. Contracted form of wasabi (山葵).
  • Shari: Vinegar rice or rice. It may originally be from the Sanskrit zaali (शालि) meaning rice, or Śarīra. Gohan (ご飯)) or meshi (飯) in standard Japanese.
  • Tsume: Sweet thick sauce mainly made of soy sauce. Nitsume (煮詰め) in standard Japanese.[104]

Etiquette

Unlike sashimi, which is almost always eaten with chopsticks, nigirizushi is traditionally eaten with the fingers, even in formal settings.[105] Although it is commonly served on a small platter with a side dish for dipping, sushi can also be served in a bento, a box with small compartments that hold the various dishes of the meal.

Soy sauce is the usual condiment, and sushi is normally served with a small sauce dish, or a compartment in the bento. Traditional etiquette suggests that the sushi is turned over so that only the topping is dipped; this is because the soy sauce is for flavoring the topping, not the rice, and because the rice would absorb too much soy sauce and would fall apart.[106] If it is difficult to turn the sushi upside-down, one can baste the sushi in soy sauce using gari (sliced ginger) as a brush. Toppings that have their own sauce (such as eel) should not be eaten with soy sauce.

Traditionally, the sushi chef will add an appropriate amount of wasabi to the sushi while preparing it, and etiquette suggests eating the sushi as is, since the chef is supposed to know the proper amount of wasabi to use. However, today wasabi is more a matter of personal taste, and even restaurants in Japan may serve wasabi on the side for customers to use at their discretion, even when there is wasabi already in the dish.[107]

Utensils used in making sushi
Preparation utensils
Utensil Definition
Fukin Kitchen cloth
Hangiri Rice barrel
Hocho Kitchen knives
Makisu Bamboo rolling mat
Ryoribashi or saibashi Cooking chopsticks
Shamoji Wooden rice paddle
Makiyakinabe Rectangular omelette pan
Oshizushihako A mold used to make oshizushi
  • Toro nigiri (鮪とろ握り, fatty tuna belly)
  • Salmon roll (巻き鮭)
  • Kakinoha (柿の葉寿司, persimmon leaf) sushi
  • Chakin-zushi (茶巾寿司), wrapped in thin omelette
  • Sushi plate (盛り合わせ)
  • Ikura gunkan-maki (イクラ軍艦巻き)
  • Sasa (笹寿司, bamboo leaf) sushi
  • Unagi (鰻寿司, teriyaki-roasted freshwater eel) sushi
  • Nigirizushi for sale at a supermarket in Tokyo
  • Assorted sushi (盛り合わせ)
  • Assorted Western sushi (盛り合わせ)
  • Western California roll and tuna roll uramaki (カリフォルニア巻き)
  • Western spicy tuna hand roll (スパイシーツナロール)
  • Western spicy shrimp roll (スパイシー海老ロール)
  • Gari (ginger)
  • Wasabi
  • Tamago sushi

See also
  • Burong isda, Filipino fermented fish and rice similar to narezushi
  • Gimbap, Korean variant of makizushi
  • Customs and etiquette in Japanese dining
  • List of sushi and sashimi ingredients
  • List of sushi restaurants
  • Pla ra, Thai fermented fish and rice similar to narezushi
  • Nyotaimori, sushi presented on nude female body
  • Sashimi bōchō, Japanese knife to slice raw fish and seafood
  • Spam musubi, Hawaiian variant of nigirizushi
  • Sushi machine

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Further reading
  • Joro Ono, Masuhiro Yamamoto (2014). 鮨 すきやばし次郎: JIRO GASTRONOMY (in Japanese). Shogakukan. ISBN 978-4093883856.
  • Joro Ono, Masuhiro Yamamoto (2016). 匠 すきやばし次郎: JIRO PHILOSOPHY (in Japanese). Shogakukan. ISBN 978-4093884976.
  • Mitshuhiro Araki, Chieko Asazuma (2004). 江戸前「握り」 (in Japanese). Kobunsha. ISBN 978-4334032319.
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