Onigiri (お握り or御握り), also known asomusubi (お結び) ornigirimeshi (握り飯), is aJapaneserice ball made fromwhite rice. It is usually formed into triangular or cylindrical shapes, and wrapped innori (seaweed).[a] Onigiri traditionally have sour or salty fillings such asumeboshi (pickledChinese plum), saltedsalmon,katsuobushi (smoked and fermentedbonito),kombu,tarako ormentaiko (pollock roe), ortakanazuke (pickledJapanese giant red mustard greens). Because it is easily portable and eaten by hand, onigiri has been used as portable food orbento from ancient times to the present day. Originally, it was used as a way to use and store left-over rice, but it later became a regular meal. Many Japaneseconvenience stores and supermarkets stock onigiri with various fillings and flavors. It has become so mainstream that it is even served inizakayas and sit-down restaurants. There are even specialized shops which only sell onigiri totake out. Due to the popularity of this trend in Japan, onigiri has become a popular staple in Japanese restaurants worldwide.
Onigiri is not a form ofsushi and should not be confused with the type of sushi callednigirizushi or simplynigiri. Onigiri is made with plain rice (sometimes lightly salted), while sushi is made of rice withvinegar, sugar and salt.[1] Onigiri makes rice portable and easy to eat as well as preserving it, while sushi originated as a way of preservingfish.
On November 12, 1987,[2] lumps of carbonized grains of rice, thought to be riceballs, were excavated from a building belonging to theYayoi period (2000 years ago) in the Sugitani Chanobatake Ruins inIshikawa Prefecture. The carbonized rice had traces which revealed that it was formed by human hands, thus it was initially documented as "the oldest onigiri."[2][3] In subsequent research, it was thought to be steamed and grilled, rather than boiled like today's rice, similar to another dish calledchimaki.[2][4] Since then, it has been academically called the "chimaki-shaped carbonized rice lumps (チマキ状炭化米塊)".
In Nakanoto, there is a replica of the relic on display at the roadside station Orihime-no-sato Nakanoto.[5]
Before the use ofchopsticks became widespread, in theNara period, rice was often rolled into a small ball so that it could be easily picked up. In theHeian period, rice was made into small rectangular shapes known astonjiki so that they could be piled onto a plate and easily eaten. At that time, onigiri were calledtonjiki and often consumed at outdoor picnic lunches.[6]
The first incarnation of the wordonigiri is attested in theHitachi no Kuni Fudoki (Hitachi Province Gazette), dated to 721 AD. In it, the word used isnigiri-ihi (握飯) or "crumpled rice":[7]
Nigiri-ihi Tsukuba no kuni, kuniburi no kotoba-ni ifu.
("In the Tsukuba[b] dialect, it is known as nigiri-ihi.")
InMurasaki Shikibu's 11th-century diaryMurasaki Shikibu Nikki, she writes of people eatingtonjiki rice balls.[9][10] Other writings, dating back as far as the seventeenth century, state that manysamurai storedrice balls wrapped inbamboo sheath as a quick lunchtime meal during war.
From theKamakura period to the earlyEdo period, onigiri was used as a quick meal. This made sense as cooks simply had to think about making enough onigiri and did not have to concern themselves with serving. These onigiri were simply balls of rice flavored withsalt.Nori did not become widely available until theGenroku era (1688–1704) of the mid-Edo period, when the farming of nori and fashioning it into sheets became widespread.[citation needed]
In the 1980s, a machine to make triangular onigiri was invented. Rather than rolling the filling inside, the flavoring was put into a hole in the onigiri and the hole was hidden by nori. Since the onigiri made by this machine came with nori already applied to the rice ball, over time the nori became moist and sticky, clinging to the rice.[citation needed]
A packaging improvement allowed the nori to be stored separately from the rice. Before eating, the diner could open the packet of nori and wrap the onigiri. The use of a hole for filling the onigiri made new flavors of onigiri easier to produce as this cooking process did not require changes from ingredient to ingredient. Modern mechanically wrapped onigiri are specially folded so that the plastic wrapping is between the nori and rice to act as a moisture barrier. When the packaging is pulled open at both ends, the nori and rice come into contact and are eaten together. This packaging is commonly found for both triangular onigiri and rolls (細巻き).[citation needed]
The rice may be seasoned with salt,sesame,furikake, driedshiso flakes, and so on. Onigiri are typically triangular, but can come in many shapes, including round, cylindrical, rectangular, etc.[citation needed]
Stores selling onigiri of various flavors and fillings
Umeboshi,okaka, ortsukudani have long been frequently used as fillings for onigiri. Generally, onigiri made with pre-seasoned rice is not filled with ingredients. Plain (salt only) onigiri is calledshio-musubi.
Typical fillings are listed below:
Dressed dishes: tuna with mayonnaise (シーチキン), shrimp with mayonnaise,negitoro (ネギトロ), etc.
Yaki-onigiri (焼きおにぎり "grilled onigiri") are first shaped by compacting white rice, then grilling it until brown, then coating withsoy sauce ormiso, and finally broiling it. Yaki-onigiri is also sold commercially as frozen food.
Miso-onigiri (味噌おにぎり) is mainly in eastern Japan.Miso is used as fillings, sometimes mixed withgreen onion, or spread over and roasted as a variant of yaki-onigiri.
Age-onigiri (揚げおにぎり "fried onigiri") are first shaped by compacting white rice, then frying it in a frying pan or wok using cooking oil until it is golden brown. Because of the oil, the flavor is richer than yaki-onigiri. If eating it as is, it can be seasoned with soy sauce, miso, or salt.
To eat it in a soup, first place it in a bowl. Add condiments such as chives,miyakogusa,wasabi, grated ginger,nori,umeboshi plum, and pour hot Japanese-style soup stock. Eat while breaking up the onigiri that have absorbed the soup stock.
There are several variations of the age-onigiri. For example, there is a version where the rice being fried has Japanese flavoring, such astakikomi gohan. There is also a Western style variation where melted cheese is used as the filling, the rice is deep-fried with western ingredients such as ketchup and curry, and the onigiri is topped with a western-style soup.
Bakudan-onigiri are round, extra large onigiri fully wrapped innori
Bakudan-onigiri (爆弾おにぎり "bomb-shaped onigiri") are large, spherical rice balls wrapped entirely innori, so that no rice is exposed. Like other onigiri, they are usually filled with dried fish andumeboshi plums. Bakudan-onigiri are known to be simple to make and easy to hold without getting the hands sticky.
Porktamago-onigiri (ポーク玉子おにぎり "pork egg onigiri") oronipō (おにポー) for short, is a variation fromOkinawa Prefecture which combines rice, seaweed, pork, and eggs.[11] It is similar toonigirazu (rice andlunch meat in sandwich form).
Samgak-gimbap (삼각김밥) — Literally "trianglegimbap". It originates from Japanese onigiri and is sold in convenience stores in South Korea.[14] Fillings vary greatly; the expiration date is one day; it typically provides between 600 and 850 kilojoules (140 and 200 kcal) of food energy.