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