These are really cute Japanese stickers. In Japanese cuisine, sushi is vinegared rice, usually topped with other ingredients, including fish, various meats, and vegetables. There are "ebi" (shrimp), "uni" (sea urchin), "maguro" (tuna), "kappa maki" (cucumber sushi rolls) etc.
The word sushi itself comes from an outdated grammatical form of a word that is no longer used in other contexts; literally, sushi means "it's sour."
These are perfect for scrapbooking, card making or any project you can think of!