Sorry you fellows had a bad experience with the cuisine. Sushi rice should be warm or room temperature, not cold.
Also, sushi does not need to have raw fish. One can put almost* anything into a roll of rice and seaweed and call it sushi (kind of like mehshi).
Sashimi is always raw fish (on a bed of rice).
* I say almost, because the mod is certain to ask if you can put a leather boot into the roll, and the answer would be no.