If you dream sushi, its dream interpretation can mean you crave this fresh food. Other interpretations include meanings associated with this dream image. You might be having treasured memories associated with sushi. During your previous waking day, something may have reminded you of this memory, which then triggered this dream.
Many years ago, a group of my church friends used to celebrate meals with sushi. This memory is the most striking association with sushi. Whenever I come across sushi, either in word, dream or the physical form, I will always think of this group of friends.
Likewise, all dreamers have their own special associations with each image/ intangible concept. What a dream means to each person, is subject to that individual’s store of information, culture, experience and associations.