November 19, 2010 in All about Japan, Sekaione Press by adminsekaione

All about Japan: Sushi

Sushi (??) is a Japanese dish consisting of cooked vinegared rice which is commonly topped with other ingredients, such as fish or other seafood, or put into rolls.

The traditional form of sushi is fermented fish and rice, preserved with salt in a process that has been traced to Southeast Asia, where it remains popular today. The term sushi comes from an archaic grammatical form no longer used in other contexts; literally, “sushi” means “it’s sour”, a reflection of its historic fermented roots. The science behind the fermentation of fish packed in rice is that the vinegar produced from fermenting rice breaks the fish down into amino acids. This results in one of the five basic tastes, called umami in Japanese. The oldest form of sushi in Japan, narezushi, still very closely resembles this process. In Japan, narezushi evolved into oshizushi and ultimately Edomae nigirizushi, which is what the world today knows as “sushi.” Contemporary Japanese sushi has little resemblance to the traditional lacto-fermented rice dish. Originally, when the fermented fish was taken out of the rice, only the fish was consumed and the fermented rice was discarded. The strong-tasting and smelling funazushi, a kind of narezushi made near Lake Biwa in Japan, resembles the traditional fermented dish. Beginning in the Muromachi period (AD 1336–1573) of Japan, vinegar was added to the mixture for better taste and preservation. The vinegar accentuated the rice’s sourness and was known to increase its shelf life, allowing the fermentation process to be shortened and eventually abandoned. In the following centuries, sushi in Osaka evolved into oshi-zushi. The seafood and rice were pressed using wooden (usually bamboo) molds. By the mid 18th century, this form of sushi had reached Edo (contemporary Tokyo). The contemporary version, internationally known as “sushi”, was created by Hanaya Yohei (?????; 1799–1858) at the end of the Edo period in Edo. The sushi invented by Hanaya was an early form of fast food that was not fermented (therefore prepared quickly) and could be eaten with one’s hands by a road or in a theatre. Originally, this sushi was known as Edomae zushi because it used freshly caught fish in the Edo-mae (Edo Bay or Tokyo Bay). Though the fish used in modern sushi no longer usually comes from Tokyo Bay, it is still formally known as Edomae nigirizushi.

INGREDIENTS

All sushi has a base of specially prepared rice, complemented with other ingredients.

Sushi rice

Sushi is made with white, short-grained, Japanese rice mixed with a dressing made 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, the mixing is done with a hangiri, which is a round, flat-bottom wooden tub or barrel, and a wooden paddle (shamoji). Sushi rice (sushi-meshi or su-meshi ??) is prepared with short-grain Japanese rice, which has a consistency that differs from long-grain strains such as those from India, Thailand, and Vietnam. The essential quality is its stickiness or glutinousness. Rice that is too sticky has a mushy texture; if not sticky enough, it feels dry. 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, of course, individual chefs have their individual methods. Most of the variations are in the rice vinegar dressing: the Kanto region (or East Japan) version of the dressing commonly uses more salt; in Kansai region (or West Japan), the dressing has more sugar.

Nori

The black seaweed wrappers used in makimono are called nori. 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. Whereas in Japan, nori may never be toasted before being used in food, many brands found in the U.S. reach drying temperatures above 108 °F (42 °C). Today, the commercial product is farmed, processed, toasted, packaged, and sold in standard-size sheets about 18 by 21 centimetres (7.1 by 8.3 in). Higher quality nori is thick, smooth, shiny, green, and has no holes. When stored for several months, nori sheets can change color to dark green-brownish. The standard size of a whole nori sheet mentioned above influences the size of maki-mono. 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 (makiyakinabe), and used to form the pouch for the rice and fillings.

Toppings and fillings

For culinary, sanitary, and aesthetic reasons, fish eaten raw must be fresher and of higher quality than fish which is cooked. The FDA recommends that raw fish be frozen before being consumed, as this will kill all parasites (but not all harmful microorganisms). Professional 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. This comes in a variety of ?toro (often from the bluefin species of tuna) and ch?toro, 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 be completely raw. Other seafoods such as squid (ika), eel (anago and unagi), pike conger (hamo), octopus (tako), shrimp (ebi and amaebi), clam (mirugai, aoyagi and akagi), 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 not thought to go well with the rice. Kani kama, or imitation crab stick, is commonly substituted for real crab, most notably in California rolls. Ebifurai-Maki (???????). Fried-Shrimp Roll. Pickled daikon radish (takuan) in shinko maki, pickled vegetables (tsukemono), fermented soybeans (natt?) in natt? maki, avocado, cucumber in kappa maki, asparagus, yam, pickled ume (umeboshi), gourd (kanpy?), burdock (gobo), and sweet corn (possibly mixed with mayonnaise) are also used in sushi. Tofu and eggs (in the form of slightly sweet, layered omelette called tamagoyaki and raw quail eggs ride as a gunkan-maki topping) are common.

Condiments

Sushi is commonly eaten with condiments. Sushi may be dipped in sh?yu, soy sauce, and may be flavored with wasabi, a piquant paste made from the grated root of the Wasabia japonica plant. True wasabi has anti-microbial properties and may reduce the risk of food poisoning. 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 of Japan. If manufactured in Japan, it may be labelled “Japanese Horseradish”.[15] Gari, sweet, pickled ginger is eaten with sushi 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.

PRESENTATION

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 sh?-chiku-bai (???), sh?/matsu (?, pine), chiku/take (?, bamboo) and bai/ume (?, ume), with matsu the most expensive and ume the cheapest.