Not what people usually think of when they hear sushi. These are pouches made of fried tofu, that are stuffed with sushi rice. Along with the nori (black seaweed) sushi rolls, this is a cheap and popular type of sushi. From Shinkatei Hyakkajiten Vol. 1, Kodan-sha, 1967. Aburage is fried slices of tofu that can be bought in stores that sell Japanese food. They are often sold 2 pieces to a package, but are also available in Japan in a form that has already been opened into pouches for this sushi. For this recipe, 20 pieces, or 40 half pieces, are necessary.