there are many different kinds of sushi. the most common sushi in japan is : fish meat that is placed on top of a small portion of "sumeshi". sometimes you may find other ingredients on top of the "sumeshi", such as roe (fish eggs), and sea urchin meat, instead of fish. another type of sushi, , consists of "sumeshi" rolled around fish and/or vegetables. in the us, "makizushi" is more popular than "nigirizushi". another type is known as or a hand roll. this kind of sushi comes in a cone-shape, created by the "nori" wrapped around the ingredients inside. they are usually filled with a mixture of "sumeshi", fish, and vegetables.